Titanium has plasticity, with an elongation rate of 50-60% and a cross-sectional shrinkage rate of 70-80% for high-purity titanium. However, its strength is low and it is not suitable as a structural material. The presence of impurities in titanium has a significant impact on its mechanical properties, especially interstitial impurities (oxygen, nitrogen, carbon), which can greatly increase the strength of titanium and significantly reduce its plasticity. The excellent mechanical properties of titanium as a structural material are achieved by strictly controlling the appropriate impurity content and adding alloying elements. Titanium is a silver white ductile metal with great industrial importance due to its many valuable properties. It has a lower specific gravity than iron, much higher strength than aluminum, and corrosion resistance similar to platinum. These properties make it an ideal material for building engines, aviation machinery frames, missiles, navigation facilities, etc. For these materials, they require excellent properties such as light weight, high strength, and resistance to extreme temperature changes, and titanium is unparalleled in these performance aspects. Some properties of titanium, such as tensile strength, are enhanced by forming alloys with aluminum; In addition, the alpha beta transition temperature of aluminum titanium alloy is higher than that of pure titanium. Titanium can also form useful alloys with molybdenum, manganese, iron, and other metals.