Titanium ingots have plasticity, the elongation of high purity titanium can reach 50-60%, the reduction of section can reach 70-80%, but the strength is low, not suitable for structural materials. The presence of impurities in titanium has a great influence on its mechanical properties, especially the gap impurities (oxygen, nitrogen and carbon) can greatly improve the strength of titanium and significantly reduce its plasticity. The good mechanical properties of titanium as a structural material are achieved by strictly controlling the appropriate impurity content and adding alloying elements.

Titanium is a metallic element, gray, with an atomic number of 22 and a relative atomic mass of 47.87. It can be burned in nitrogen with a high melting point. Blunt titanium and titanium - based alloys are new structural materials, mainly used in aerospace industry and Marine industry.

Titanium has a density of 4.506-4.516 g/cm3 (20 ° c), higher than aluminum and lower than iron, copper and nickel. But the specific strength is at the top of the metal, which is three times that of stainless steel and 1.3 times that of aluminum alloy. The melting point is 1668±4℃, the latent heat of melting is 3.7-5.0 kcal/g atom, the boiling point is 3260±20℃, the latent heat of vaporization is 102.5-112.5 kcal/g atom, the critical temperature is 4350℃, the critical pressure is 1130 atmosphere. The thermal and electrical conductivity of titanium is poor, similar to or slightly lower than that of stainless steel, titanium has superconductivity, and the superconductivity critical temperature of pure titanium is 0.38-0.4k. At 25℃, the heat capacity of titanium is 0.126 CAL/g · degree, enthalpy 1,149 CAL/g · degree, entropy 7.33 CAL/g · degree, and the metal titanium is a paramagnetic material with a magnetic permeability of 1.00004.

Titanium has plasticity, the elongation of high purity titanium can reach 50-60%, the reduction of section can reach 70-80%, but the strength is low, not suitable for structural materials. The presence of impurities in titanium has a great influence on its mechanical properties, especially the gap impurities (oxygen, nitrogen and carbon) can greatly improve the strength of titanium and significantly reduce its plasticity. The good mechanical properties of titanium as a structural material are achieved by strictly controlling the appropriate impurity content and adding alloying elements.