Overview

Titanium alloy bars are solid, long metal products manufactured from titanium-based alloys, representing one of the most advanced material solutions in modern engineering. These bars are produced through hot rolling, forging, extrusion, or cold drawing processes, resulting in round, square, flat, or hexagonal cross-sections that serve as the foundation for countless high-performance components across aerospace, medical, chemical, and marine industries .

Titanium possesses two allotropic crystal structures: hexagonal close-packed (α phase) below 882°C and body-centered cubic (β phase) above 882°C. This allotropic behavior forms the basis for the three primary classifications of titanium alloys: α alloys, α+β dual-phase alloys, and β alloys. The most common titanium alloy bar—Ti-6Al-4V (Grade 5)—accounts for nearly 50% of global titanium consumption, offering an exceptional balance of strength, fabricability, and corrosion resistance .

Titanium alloy bars transform the remarkable properties of titanium—exceptional strength-to-weight ratio, outstanding corrosion resistance, and excellent biocompatibility—into versatile engineering stock for manufacturing shafts, fasteners, medical implants, valve components, and structural parts. With a density of approximately 4.43-4.51 g/cm³ (about 45% lighter than steel), tensile strengths ranging from 240 MPa for pure titanium grades to over 1,200 MPa for high-strength alloys, and corrosion resistance that outperforms stainless steel in seawater by factors of 2-5 times , titanium bars offer engineers an unparalleled combination of performance characteristics.

Available in a comprehensive range of grades—from commercially pure titanium (Grades 1-4) for maximum corrosion resistance and formability, through the workhorse Ti-6Al-4V (Grade 5) for structural applications, to specialized alloys like Ti-6Al-2Sn-4Zr-6Mo for high-temperature and sour service—titanium alloy bars provide solutions for the most demanding engineering challenges .

Key Features

• Exceptional Strength-to-Weight Ratio: Titanium alloy bars offer mechanical strength comparable to many steels at approximately 45% lighter weight. Grade 5 titanium bars achieve tensile strengths of 900-950 MPa with a density of only 4.43 g/cm³, making them ideal for weight-critical applications in aerospace, automotive, and high-performance equipment .

• Outstanding Corrosion Resistance: Titanium forms a stable, self-repairing oxide layer that provides exceptional resistance to seawater, chlorine-rich environments, and various acids. Actual tests show corrosion rates of less than 0.01 mm/year after 90 days continuous exposure to natural seawater. In high humidity, salt spray, and chloride environments, titanium components last 2-5 times longer than conventional stainless steel .

• Excellent Biocompatibility: Titanium is biologically inert and non-toxic, making it the material of choice for medical implants. Grades such as Ti-6Al-4V ELI (Grade 23) with Extra Low Interstitial elements meet stringent ISO 13485 and ASTM F136 requirements, ensuring compatibility with human tissue for implantable devices including artificial joints, dental implants, and spinal fixation hardware .

• High-Temperature Stability: Titanium alloy bars maintain stable mechanical properties at elevated temperatures, with long-term working capabilities of 350-400°C for Grade 5, and the ability to withstand over 500°C without significant strength loss. They also retain excellent toughness at cryogenic temperatures, making them suitable for LNG systems and aerospace applications with extreme thermal cycling .

• Excellent Fatigue Resistance: Annealed Grade 5 titanium bars offer fatigue strength up to 510 MPa and fracture toughness of 55-75 MPa·√m, ensuring reliable performance under vibration and cyclic loading. This makes them ideal for aerospace fasteners, subsea structures, and heavily loaded components .

• Good Fabricability with Proper Techniques: While titanium requires specific handling, it can be successfully machined, welded, and formed using appropriate methods. Recommended machining parameters include cutting speeds of 15-50 m/min, feeds of 0.05-0.2 mm/rev, and carbide tools with ample cooling . Welding requires inert gas shielding (O₂ < 50 ppm) using TIG or electron beam methods .

• Wide Range of Available Forms: Titanium alloy bars are offered in multiple shapes to suit diverse applications :

  • Round bars: The most common form for shafts, valves, fasteners, and general machining (2-350mm diameter)

  • Flat bars: Ideal for structural supports, flanges, medical device blanks, and custom fabrications

  • Square and hexagonal bars: Preferred for fasteners, fittings, and precision-machined components

  • Rectangular bars: For specialized structural applications

  • Hollow bars: For weight reduction or fluid handling applications

Specifications with Explanation

Titanium Alloy Bar Chemical Composition by Grade (Typical values, wt%)

Typical Mechanical Properties

Physical Properties

Applicable Bar Standards

Available Bar Dimensions and Forms

Tolerance Examples (Hot Worked Square Bars)

Surface Finishes Available

• Acid surface (pickled)

• Polished (various grits up to mirror finish Ra ≤ 0.8 µm)

• Sand blasted

• Bright finish

• Anodized (various colors)

• Black / as-rolled (for forging stock)

Applications

Titanium alloy bars serve as the essential raw material for countless precision components across industries where strength-to-weight ratio, corrosion resistance, and biocompatibility are critical:

Aerospace and Defense

• Aircraft Structural Components: Fuselage reinforcement beams, seat rails, brackets, and connectors requiring lightweight high strength

• Engine Parts: Compressor components, fan blades, and support rings for gas turbines

• Fasteners: High-strength bolts, screws, and rivets for aircraft assembly

• Satellite Components: Load-bearing brackets and structural elements for space applications

• Missile and Defense Hardware: Critical components requiring reliability under extreme conditions

Medical and Healthcare

• Surgical Implants: Spinal fixation plates, orthopedic bone plates, and dental implants using Grade 23 ELI

• Surgical Instruments: Forceps, retractors, and specialized tool components

• Medical Device Components: MRI equipment structures, rehabilitation devices, and non-implantable surgical fixtures

• Prosthetic Devices: Components requiring biocompatibility and fatigue resistance

Chemical Processing Industry

• Valve Components: Stems, seats, and bodies for valves handling corrosive chemicals

• Pump Shafts and Impellers: Rotating components in pumps transferring acids and aggressive fluids

• Heat Exchanger Components: Tube sheets and baffles for corrosive service

• Reactor Internals: Agitator shafts and support grids

Marine and Offshore Engineering

• Subsea Components: ROV parts, deep-sea connection blocks, and pressure housings for underwater equipment

• Desalination Plants: Tube sheets and support structures for multi-stage flash evaporators

• Seawater Piping Systems: Fittings and flanges requiring long-term corrosion resistance

• Oil & Gas Drilling: Shafts and housings for drilling tools, subsea wellheads, and riser components

Industrial Applications

• High-Performance Automotive: Engine tappets, connecting rods, suspension components, and valve train parts

• Power Generation: Turbine components and heat exchanger parts

• Scientific Research Equipment: NMR brackets, particle instrument structures, and non-magnetic precision components

• Sports Equipment: High-end bicycle frames, golf club components, and sporting goods

Medical and Laboratory Equipment

• Clean Room Components: Equipment requiring non-contaminating surfaces

• Pharmaceutical Processing: Components for sterile manufacturing environments

Comparison: Grade Selection Guide

Buying Guide

Selecting the appropriate titanium alloy bar requires careful evaluation of service conditions, mechanical requirements, fabrication considerations, and economic factors:

1. Define Service Environment:

   • Corrosive Media: Identify specific chemicals, concentrations, and temperature. For seawater and general corrosion, CP grades often suffice. For reducing acids, consider Grade 7 or 12.

   • Temperature Range: Maximum operating temperature

     • CP Grades: Up to 300°C

     • Grade 5: Up to 400°C for long-term service

     • High-temperature alloys: Up to 540°C

   • Mechanical Loading: Static, cyclic, or impact loading. For high fatigue applications, Grade 5 is preferred .

   • Biocompatibility Requirements: For implantable devices, specify Grade 23 (ELI) with ASTM F136 certification .

2. Select Alloy Grade:

   • Commercially Pure Grades 1-4: For corrosion resistance with moderate strength requirements

     • Grade 1: Maximum formability, chemical equipment

     • Grade 2: General purpose, marine, industrial

     • Grade 3: Higher strength, chemical processing

     • Grade 4: Highest strength pure titanium

   • Grade 5 (Ti-6Al-4V): For high-strength structural applications requiring excellent fatigue resistance

   • Grade 23 (Ti-6Al-4V ELI): For medical implants and critical fracture-critical applications

   • Specialty Alloys: For elevated temperature or specialized environments

3. Determine Bar Form and Dimensions:

   • Round Bar: For shafts, valves, general machining (2-350mm diameter)

   • Flat Bar: For structural supports, flanges, medical device blanks (thickness 2-300mm, width 10-300mm)

   • Square/Hex Bar: For fasteners, fittings, tool stock

   • Custom Shapes: Available for specialized applications

   • Specify diameter/size, length, and tolerance requirements

4. Specify Condition and Finish:

   • Annealed (M): Softest, most machinable, suitable for extensive machining

   • Hot Rolled (R): Standard finish for general applications

   • Cold Rolled/Cold Drawn (Y): Tighter tolerances, improved surface finish

   • Forged: For large sections or specialized grain flow requirements

   • Surface Finish: Acid surface, polished, sandblasted, or anodized as required

5. Verify Specifications and Standards:

   • Confirm applicable ASTM/ASME standards:

     • CP Grades: ASTM B348 / ASME SB-348, ASTM F67 (medical)

     • Grade 5: ASTM B348 / ASME SB-348, AMS 4928, AMS 6931

     • Grade 23: ASTM B348 / ASME SB-348, ASTM F136, ISO 5832-3

   • For aerospace applications, verify AMS specifications

   • For medical implants, ensure ASTM F136 compliance

   • For defense applications, verify MIL-T-9047G

6. Consider Fabrication Requirements:

   • Machining: Plan for appropriate speeds/feeds (15-50 m/min) and carbide tooling

   • Welding: Requires inert gas shielding (O₂ < 50 ppm)

   • Forming: Consider minimum bend radii (typically 3x thickness for cold bending)

7. Request Documentation:

   • Mill Test Certificates (MTC) per EN 10204 3.1/3.2 with:

     • Heat number and full chemical composition

     • Complete mechanical property test results

     • Heat treatment records

   • PMI (Positive Material Identification) certification when required

   • Third-party inspection reports for critical applications

FAQ

Q1: What is the difference between Grade 5 and Grade 23 titanium bars?

A: Both are Ti-6Al-4V alloys, but Grade 23 is an "Extra Low Interstitial" (ELI) version with tighter control of oxygen, nitrogen, carbon, and hydrogen. Oxygen content in Grade 23 is limited to 0.13% max compared to 0.20% max in Grade 5 . This results in improved ductility and fracture toughness for Grade 23, making it the preferred choice for medical implants and critical fracture-critical applications. Grade 5 (standard) offers slightly higher strength and is more commonly used for general structural applications .

Q2: What is the maximum service temperature for Grade 5 titanium bars?

A: Grade 5 (Ti-6Al-4V) titanium bars maintain stable mechanical properties for long-term continuous service up to approximately 400°C (750°F) . For short-term exposure, they can withstand temperatures above 500°C without significant strength loss. For applications requiring higher temperature capability, consider specialized high-temperature alloys like Ti-6Al-2Sn-4Zr-6Mo or Ti-6242.

Q3: Can titanium bars be welded, and what precautions are required?

A: Yes, titanium bars can be successfully welded using GTAW (TIG) or electron beam welding methods. Critical requirements include :

• Inert gas shielding (argon or helium) on both weld face and root with oxygen levels below 50 ppm

• Absolutely clean surfaces free of oils, grease, and oxides

• Matching filler metal composition

• Controlled heat input to prevent contamination
  Contamination by oxygen, nitrogen, or hydrogen can cause embrittlement and must be strictly avoided.

Q4: Are titanium alloy bars magnetic?

A: No, titanium and its alloys are non-magnetic . This property is valuable in applications requiring non-magnetic materials, such as medical imaging equipment (MRI), electronic housings, and certain aerospace components. The non-magnetic nature also contributes to titanium's biocompatibility for medical implants.

Q5: How does titanium compare to stainless steel for corrosion resistance?

A: Titanium offers significantly superior corrosion resistance compared to stainless steels in many environments, particularly :

• Seawater and chloride environments (titanium is virtually immune to pitting and crevice corrosion)

• Actual tests show corrosion rates <0.01 mm/year after 90 days in natural seawater

• Service life in high humidity and salt spray is 2-5 times longer than stainless steel

• Wet chlorine gas and hypochlorite solutions
  However, titanium can be attacked by certain reducing acids at elevated concentrations, where specialized stainless steels or nickel alloys may be preferred.

Delivery, Certification & Service

Quality Certification

• Material Traceability: Complete heat traceability from ingot to finished bar with unique identification markings per applicable standards

• Mill Test Certificates (MTC) : EN 10204 3.1/3.2 compliant certificates provided with every shipment including :

  • Heat number and full chemical composition analysis per applicable specifications

  • Complete mechanical property test results (tensile, yield, elongation)

  • Heat treatment records

  • Ultrasonic inspection reports when specified

• Third-Party Inspection: Available through Lloyds, DNV, Bureau Veritas, ABS, SGS, TÜV, or customer-nominated agencies

• Special Testing Available :

  • Positive Material Identification (PMI) spectrum analysis

  • Ultrasonic inspection (Flaw detection per AMS 2631)

  • Mechanical testing at elevated or cryogenic temperatures

  • Microstructural evaluation (grain size, alpha case depth)

  • Hardness testing (Rockwell or Brinell)

  • Dimensional re-inspection

Available Bar Forms and Dimensions

Cutting Tolerances

Surface Finishes Available

• Acid Surface / Pickled: Standard industrial finish (Ra≈3.2 µm)

• Sand Blasted: Medium finish (Ra≈1.6 µm) for improved coating adhesion

• Mechanical Polished: Fine finish (Ra≤0.8 µm) for medical and clean applications

• Mirror Polished: Precision finish (Ra≤0.2 µm) for highest requirements

• Anodized: Various colors (industrial gray, blue, gold) for appearance or functional purposes

• Bright Finish: Cold drawn smooth surface

• Black / As-Rolled: For forging stock or further processing

Packaging and Protection

• Vacuum Bag Sealing: For high-value or precision bars

• VCI Protection: Vapor Corrosion Inhibitor film for long-term storage or marine shipment

• Foam Spacers: Between bars to prevent surface damage

• Wooden Crates: Export-grade plywood boxes for international shipping

• Steel Frames: For large diameter bars

• End Protection: Plastic caps for precision bars to prevent end damage

• Custom Marking: Stenciling, tagging, or stamping per customer specifications

• Shipping Options:

  • FedEx/DHL express for urgent orders ≤50 kg

  • Air freight, sea freight, or full container for large orders

After-Sales Technical Support

• Material Selection Assistance: Expert guidance on grade selection for specific applications based on service conditions

• Machining Recommendations: Technical guidance on speeds, feeds, and tooling for optimal machinability

• Welding Support: Procedure recommendations and parameter optimization

• Forming Guidance: Recommendations for bending radii and forming parameters

• Heat Treatment Guidance: For annealing or stress relieving requirements

• Failure Analysis: Investigation and analysis of in-service material performance issues

• Fabrication Support: Water jet cutting, CNC milling, drilling, and chamfering services available

• Free Sample Evaluation: For alloy selection validation

Delivery Commitment

• Stock Items: 48 hours to 1-2 weeks for standard sizes and common grades (Grade 2, Grade 5)

• Mill Orders: 8-12 weeks for non-standard dimensions, specialty alloys, or special certification requirements

• Express Service: 48-hour shipping for urgent small orders (≤50 kg)

• Just-in-Time (JIT) Delivery: Coordinated delivery schedules to support lean manufacturing

• Global Logistics: International shipping with full export documentation, customs clearance support

Quality Assurance

All titanium alloy bars are manufactured in accordance with strict quality management systems, certified to ISO 9001:2015 and applicable industry standards. Production facilities maintain :

• Advanced Melting Capabilities: Multiple vacuum melting processes for optimal purity

• Precision Thermomechanical Processing: Optimized hot working (rolling/forging/extrusion) and heat treatment cycles

• Precision Finishing: State-of-the-art cold drawing, grinding, and turning equipment

• Comprehensive Testing: In-house laboratories with full mechanical, chemical, and non-destructive testing capabilities

• Process Certifications: Factory certifications including ISO 9001, AS9100 (aerospace), ISO 13485 (medical)

Industry-Specific Certifications Available

• Aerospace: AS9100, Nadcap, AMS specifications (AMS 4928, AMS 6931, AMS 4930)

• Medical: ISO 13485, FDA compliance, ASTM F136 (implants), ASTM F67 (non-implants)

• Defense: MIL-T-9047G, ITAR compliance

• Pressure Equipment: PED (Pressure Equipment Directive) where applicable

• Oil & Gas: NACE MR0175/ISO 15156 compliance where applicable