Titanium, Periodic Table Cycle 4 Group 4 (Titanium Subgroup) Transition Metal Element, Element Symbol Ti, Atomic Number 22, Relative Atomic Mass 47.867. Titanium is a hard, shiny, silvery-white metal with hexagonal α phases and cubic β phases. The relative density is 4.506, the melting point is 1668 °C, and the boiling point is 3287 °C. Resistivity 42x10⁻⁸Ω·m (20°C). In nature, rutile, perovskite, ilmenite and so on are mainly present. At high temperature, titanium tetrachloride is reduced by magnesium to obtain titanium sponge, and then titanium ingots are melted by arc method.
Titanium is widely distributed in nature, with a content of about 0.64% in the earth's crust, ranking fourth among metal elements after aluminum, iron and magnesium.
Titanium has very good properties, so it is widely used. Its main application fields are: aerospace, shipbuilding, chemical and petrochemical, transportation, weapons, marine, electric power, construction, metallurgy, medical treatment, sports equipment, daily necessities and light industry.