First of all, to explain a misunderstanding of the general people's understanding of "the strength of titanium alloys", titanium alloys are not high-strength materials, and the "specific strength" of titanium alloy screws is very high. The so-called "specific strength" is the "ratio of strength and density". Products usually made of titanium alloy materials are almost all to take advantage of the "low density and high strength" characteristics of titanium alloys, and are usually used in places where strength requirements and weight requirements are combined. For example, the structural parts on the aircraft are required to be light in weight and high in strength.

The density of titanium alloy is about 50%-60% of 45 steel, but the strength is comparable to 45 steel (titanium alloy is slightly higher). That is to say, titanium alloy screws and steel screws are equivalent in strength, but titanium alloy screws are lighter in weight. Titanium alloy refers to an alloy composed of other elements based on titanium, among which titanium alloy has titanium and aluminum. Alloys, titanium-copper alloys, titanium-manganese alloys and other 70 kinds of metals containing titanium. The density of titanium alloys is generally around 4.51g/cm3, which is only 60% of that of steel, and some high-strength titanium alloys exceed the strength of many alloy structural steels. Therefore, the specific strength (strength/density) of titanium alloy is much greater than that of other metal structural materials, and parts with high unit strength, good rigidity and light weight can be produced. Titanium alloys are used in aircraft engine components, skeletons, skins, fasteners and landing gear.