Introduction
In the procurement of industrial titanium wire, grade 2 and grade 5 are usually the most commonly considered choices by buyers. Having worked in the titanium industry for many years, we know that material choice directly impacts your product's performance and budget. Simply put, Grade 2 has higher corrosion resistance and Grade 5 has higher strength.
overview
Depending on what grade of Gr2 one may have an area of about 345 MPa or 483 MPa. Gr2 (UNS R50400) is a pure titanium with a titanium content exceeding 99.2% and extremely low impurity content. This high-purity titanium endows it with excellent chemical stability and flexibility, with an elongation rate typically exceeding 20%. This means that grade 2 titanium wire is very easy to weave, cold forge, and bend.
If your application requires complex shape processing or emphasizes excellent corrosion resistance (such as chemical filters, medical devices, eyeglass frames, or anode hangers), then grade 2 titanium wire is undoubtedly the cost-effective first choice.
Grade 5 is an alpha beta titanium alloy (Ti-6Al-4V/UNS R56400) which is alpha beta of 6% aluminum and 4% vanadium. These metals change the physical properties of titanium, which increases their tensile strength to about 895 MPa, about 2.6 times those of grade 2 titanium alloys. Although the increase in hardness makes cold working more challenging and often requires the assistance of hot forming, it is worth it in terms of ultimate lightweight and high strength.
Therefore, if you are looking for materials for aerospace fasteners, racing springs, high-end bicycle accessories, or medical implants, and your budget is relatively sufficient, then grade 5 titanium wire is undoubtedly your most reliable choice.
Comparison Table of Material Characteristics between GR2 and GR5：
| Comparative dimension | Grade2 (Commercially Pure Titanium/TA2) | Grade 5 (Ti-6Al-4V / TC4) |
| Material Type | Commercially Pure Titanium (Single-phase α) | α+β Titanium Alloy |
| Main Composition | ≥ 99.2% Titanium, with trace Oxygen & Iron | Titanium base, ~6% Aluminum (Al), ~4% Vanadium (V) |
| Density | Approx. 4.51 g/cm³ | Approx. 4.43 g/cm³ |
| Tensile Strength | 345 - 483 MPa | ≥ 895 MPa (Up to 1100+ MPa after heat treatment) |
| Elongation | ≥ 20% (Excellent ductility) | ≥ 10% (Relatively lower) |
| Hardness | Lower (Approx. 150-210 HB) | Higher (Annealed: Approx. 30-34 HRC) |
| Corrosion Resistance | Excellent (Superior in strong oxidizing media) | Excellent (Slightly lower than GR2 in strong acids) |
| Cold Formability | Excellent (Easy to cold bend and deep draw) | Poor (Usually requires hot forming) |
| Weldability | Excellent | Good (Requires strict argon protection & high skill) |
| Max Service Temp. | Approx. 300℃ - 425℃ | Approx. 400℃ - 500℃ |
Overall, if your project focuses on ease of molding and cost control, then Level 2 materials are the choice you cannot hesitate to make; If you pursue the ultimate strength to weight ratio and high temperature resistance, then Grade 5 materials will be your best choice.
Baoji Yibaite New Materials Technology Co., Ltd. - The Best Manufacturer and Supplier of Titanium Materials