The density of titanium is 4.506-4.516g/cm^3, melting point is 1668,boiling point is 3535. In the appropriate oxidizing environment also has excellent corrosion resistance. Therefore, products are widely used in aerospace structural materials, such as aircraft, rockets, missiles and spacecraft, ship manufacture, chemical industry, conventional weapons, manufacturing, metallurgical industry, health care, ultra-high vacauum and other fields