Titanium Alloy Grade Comparison and Application Selection: Complete Guide 2026
In the global steel and metal supply industry, technical knowledge is the foundation of every successful procurement decision. This comprehensive guide covers essential engineering principles, industry standards, and practical considerations that every professional in the metallurgical supply chain should understand. As a leading supplier, CoreMetal Steel (Xi’an Coremetal Steel Co., Ltd.) provides this technical reference to support informed material selection and project specification.
Titanium Alloy Classification Overview
Titanium and its alloys are classified into four main categories based on their microstructure, which determines their mechanical properties, formability, weldability, and application suitability:
| Category | Key Alloying Elements | Characteristics | Representative Grades |
|---|---|---|---|
| Commercially Pure (CP) | O, N, C, Fe (interstitial) | Excellent corrosion resistance, moderate strength, excellent formability | Grade 1, 2, 3, 4 |
| Alpha Alloys | Al, Sn, O | Good creep resistance, weldable, moderate strength | Grade 7, Grade 11, Grade 12 |
| Alpha+Beta Alloys | Al, V, Mo, Cr, Sn | High strength, heat treatable, good all-around properties | Grade 5 (Ti-6Al-4V), Grade 9, Grade 23 |
| Beta Alloys | Mo, V, Nb, Ta, Zr | Very high strength (after aging), good formability in solution treated condition | Ti-15V-3Cr-3Sn-3Al, Ti-10V-2Fe-3Al |
The selection of the appropriate titanium grade depends on the balance of strength, corrosion resistance, formability, weldability, and cost required for the specific application.
CP Titanium Grades Comparison
Commercially pure titanium grades differ primarily in their oxygen and iron content, which directly affects strength and ductility:
| Property | Grade 1 | Grade 2 | Grade 3 | Grade 4 |
|---|---|---|---|---|
| Min Tensile Strength (MPa) | 240 | 345 | 450 | 550 |
| Min Yield Strength (MPa) | 170 | 275 | 380 | 483 |
| Min Elongation (%) | 24 | 20 | 18 | 15 |
| Max Oxygen (%) | 0.18 | 0.25 | 0.35 | 0.40 |
| Max Iron (%) | 0.20 | 0.30 | 0.35 | 0.50 |
| Formability | Excellent | Very Good | Good | Moderate |
| Corrosion Resistance | Excellent | Excellent | Excellent | Excellent |
Application selection guide for CP grades:
- Grade 1: Maximum formability applications – deep-drawn components, anode baskets, chemical processing equipment
- Grade 2: The workhorse grade – chemical processing, desalination, marine applications, architectural, medical devices. Most widely used CP grade
- Grade 3: Moderate strength with good formability – aircraft structures, chemical processing where higher strength than Grade 2 is needed
- Grade 4: Highest strength CP grade – surgical implants, airframe components, spring applications
Ti-6Al-4V (Grade 5) and Its Variants
Grade 5 (Ti-6Al-4V) is the most widely used titanium alloy, accounting for approximately 50% of total global titanium usage. Its combination of high strength, good corrosion resistance, and reasonable fabricability makes it the default choice for demanding applications.
| Property | Grade 5 | Grade 23 (ELI) | Grade 9 (Ti-3Al-2.5V) |
|---|---|---|---|
| Min Tensile Strength (MPa) | 895 | 860 | 620 |
| Min Yield Strength (MPa) | 830 | 795 | 483 |
| Min Elongation (%) | 10 | 10 | 15 |
| Density (g/cm3) | 4.43 | 4.43 | 4.48 |
| Max Service Temperature (C) | 400 | 400 | 315 |
| Fracture Toughness | Good | Excellent | Very Good |
Grade 5 applications:
- Aerospace structural components, jet engine parts, airframe fittings
- Medical implants (orthopedic, dental)
- Marine and offshore components
- High-performance automotive (connecting rods, valves, springs)
- Sports equipment (golf clubs, bicycle frames)
Grade 23 (Ti-6Al-4V ELI) offers improved fracture toughness and fatigue crack growth resistance due to lower interstitial content. Preferred for medical implants and critical aerospace applications.
Grade 9 (Ti-3Al-2.5V) provides a balance between CP titanium formability and Grade 5 strength. Widely used in hydraulic and pneumatic tube systems and aircraft structures where tube bending is required.
Specialty Titanium Grades
| Grade | Designation | Key Features | Primary Applications |
|---|---|---|---|
| Grade 7 | Ti-0.15Pd | Enhanced crevice corrosion resistance; Pd addition | Chemical processing, flue gas desulfurization |
| Grade 12 | Ti-0.3Mo-0.8Ni | Excellent crevice corrosion resistance; moderate strength | Chemical processing, pollution control |
| Grade 19 | Beta C (Ti-3Al-8V-6Cr-4Mo-4Zr) | Very high strength (1200+ MPa); deep hardenability | Aerospace fasteners, springs, shafts |
| Grade 21 | Ti-15-3 (Ti-15V-3Cr-3Sn-3Al) | Excellent cold formability in solution treated condition | Aerospace sheet metal, honeycomb |
| Grade 29 | Ti-6242S | High-temperature creep resistance up to 540 C | Jet engine compressor components |
For applications requiring a balance of creep resistance and moderate strength at elevated temperatures (400-600 C), near-alpha alloys such as Ti-6242S and IMI 834 are preferred. These alloys offer better creep resistance than alpha-beta alloys while maintaining adequate strength and oxidation resistance.
Application Selection Matrix
| Application | Recommended Grade(s) | Key Selection Factors |
|---|---|---|
| Chemical Processing (general) | Grade 2, Grade 7, Grade 12 | Corrosion resistance, availability, cost |
| Desalination | Grade 2, Grade 12 | Seawater corrosion resistance, heat transfer |
| Marine (seawater piping) | Grade 2, Grade 9, Grade 12 | Seawater resistance, erosion resistance, tube formability |
| Aerospace Structural | Grade 5, Grade 23 | High strength-to-weight, fatigue resistance |
| Jet Engine (compressor) | Grade 6, Grade 29 | Creep resistance, elevated temperature stability |
| Medical Implants | Grade 23 (ELI), Grade 4 (CP) | Biocompatibility, fracture toughness, osseointegration |
| Heat Exchanger Tubes | Grade 2, Grade 9 | Corrosion resistance, tube formability, thermal conductivity |
| Sports Equipment | Grade 5, Grade 9 | Strength-to-weight ratio, cost |
CoreMetal Steel supplies titanium in all standard grades (1-4, 5, 5 ELI, 9, 12, 7, 11) as sheets, plates, tubes, bars, wire, and fittings with full material certification and traceability.
Why Choose CoreMetal Steel as Your Trusted Supplier
Xi’an Coremetal Steel Co., Ltd. (CoreMetal Steel) is a professional steel and metal products supplier with ISO 9001 certification, serving clients in over 60 countries worldwide. Our product range covers carbon steel, stainless steel, alloy steel, galvanized steel, aluminum, copper, titanium, and nickel alloy products in various forms including plates, sheets, coils, pipes, tubes, bars, fittings, and flanges.
Our competitive advantages include:
- Certified Quality: ISO 9001 certified with full Mill Test Certificates (MTC) provided for every shipment
- Comprehensive Inventory: Extensive stock of standard and specialized products for immediate delivery
- Global Logistics: Efficient shipping from major Chinese ports with seaworthy export packaging
- Technical Support: Professional team available for material selection guidance and specification consultation
- Competitive Pricing: Direct mill-source pricing with transparent cost structures
For technical consultations, material inquiries, or competitive quotations, contact our team:
Contact: Tracy
Email: tracy@coremetalsteel.com
Phone/WhatsApp: +86 18291910632
We welcome OEM/ODM orders and look forward to establishing long-term partnerships with clients worldwide. Request your quote today and experience the CoreMetal difference in quality, service, and value.