What Is The Most Commonly Used Titanium Alloy?

The three most commonly used titanium alloys are TC4, TC6, and TC11. They all have high specific strength, high temperature resistance, and oxidation resistance. Recently, some customers have called me with this question. Because our materials are used in different ways, we want them to be comfortable and user-friendly. I’d like to compare the various performance characteristics of these three materials.

1. TC4 Titanium Alloy

Operating Temperature: -100-550°C, Density: 4.51 g/cm³. Room Temperature Mechanical Properties (25°C): Tensile Strength σb/MPa ≥ 895, Specified Residual Elongation Stress σr0.2/MPa ≥ 825, Elongation δ5% ≥ 10, Reduction of Area ψ% ≥ 25. High-Temperature Mechanical Properties (400°C): Tensile Strength: σb/MPa ≥ 620, Endurance Strength: σ100h/MPa ≥ 570.

TC4 titanium alloy offers a range of advantages, including excellent corrosion resistance, low density, high specific strength, and good toughness and weldability. After solution strengthening treatment, the strength increase is minimal, reaching approximately 1100 MPa. The annealed strength is generally around 900 MPa.

2. TC6 Titanium Alloy

Operating Temperature: 300°C, Density: 4.51 g/cm³. Room Temperature Mechanical Properties (25°C) Tensile strength σb/MPa ≥ 980, specified residual elongation stress σr0.2/MPa ≥ 840, elongation δ5(%) ≥ 10, reduction of area ψ(%) ≥ 25. High-temperature mechanical properties (400°C): Tensile strength: σb/MPa ≥ 735, endurance strength: σ100h/MPa ≥ 665. Advantages: Excellent microstructure and performance stability up to 300°C/5000h. High-temperature properties such as transient tensile strength, creep, and endurance at different temperatures are comparable to those of the double-annealed and isothermal-annealed conditions.

TC6 titanium alloy semi-finished products that have undergone conventional annealing can meet the operating temperature requirements of aircraft structural components (below 300°C).

3. TC11 Titanium Alloy

Operating Temperature: 500°C, Density: 4.51 g/cm³. Room Temperature Mechanical Properties (25°C): Tensile Strength: σb/MPa>1030, Specified Residual Elongation Stress σr0.2/MPa≥900, Elongation δ5(%)≥10, Reduction of Area ψ(%)≥30. High-Temperature Mechanical Properties (500°C): Tensile Strength: σb/MPa>685, Endurance Strength: σ100h/MPa≥640.

Titanium Alloy Parts

Wear Resistance Comparison: Both TC4 and TC11 alloys have poor wear resistance at 25°C, but exhibit very excellent wear resistance at 600°C.

As can be seen above, TC4 does not have the high-temperature resistance of TC6 and TC11. TC11 has the highest strength, and of course, better wear resistance.

Keyword：

TC4 Titanium Alloy

TC6 Titanium Alloy

TC11 Titanium Alloy

titanium alloys

Titanium Alloy Parts