Main properties of common titanium alloys

1. High Strength.

Titanium alloys possess high-strength characteristics, and their strength can be further enhanced through heat treatment processes. This makes titanium alloys perform well in situations that require them to withstand high stress or heavy loads. The room-temperature mechanical properties of several common titanium alloys are shown in Table 1.

2. Low density.

Titanium alloys have a density of about 4.5 g/cm³, only 60% that of steel, but their strength is close to or even exceeds that of high-strength steel, giving them an exceptionally high specific strength (strength/density). This characteristic makes titanium alloys an ideal material for manufacturing lightweight, high-strength components.

3. Good corrosion resistance.

Titanium alloys perform well in a variety of corrosive media, including seawater, chlorides, nitric acid, sulfuric acid, and others. This is due to the formation of a dense oxide layer on the surface of the titanium alloy, which acts as a protective barrier that prevents the penetration and attack by corrosive agents. Therefore, titanium alloys are widely used in marine engineering, chemical equipment, and other fields.

4. Excellent heat resistance.

Titanium alloys can maintain stable mechanical properties and chemical stability at high temperatures, with the operating temperature of some heat-resistant titanium alloys reaching 600~650 ℃, much higher than that of aluminum alloys and other materials. This gives titanium alloys significant application value in aerospace engines, spacecraft, and other areas.