Titanium is a chemical element with the symbol Ti,

Titanium is a chemical element with the symbol Ti, atomic number 22 , is a silvery-white transition metal , characterized by light weight , high strength , with a metallic luster , have a good corrosion resistance ( including sea water, aqua regia and chlorine ) . Because of its chemical stability , good high temperature , low temperature, anti- acid, anti- alkali and high-strength , low density , Known as "space metal ." titanium standard part in 1791 in Cornwall, England discovered by Gregor by Klaproth for the Titans of Greek mythology with the name .Titanium is considered a rare metal , which is due to the presence of a dispersion in nature and difficult to extract . But its relative abundance ranks tenth in all elements. Titanium ores ilmenite and rutile are mainly widely distributed in the earth's crust and lithosphere being . Titanium also exists in almost all living organisms , rocks, water , and soil. The main ore extracted from the need to use titanium Kroll process or the Hunter process . The most common compounds are titanium dioxide, a white pigment can be used in the manufacture . Other compounds include titanium tetrachloride (TiCl4) ( as a catalyst for the manufacture of smoke or air and text ) and tittanium bar trichloride (TiCl3) ( for the catalytic production of polypropylene )The two most useful properties of titanium , the corrosion resistance , the highest intensity and metal - weight ratio. In unalloyed condition, titanium strength comparable with some of the steel , but also 45% lighter . There are two allotropes and five natural isotopes from Ti to Ti, which is the highest abundance of Ti (73.8%). Chemical and physical properties similar to titanium and zirconium , which is the same as the number of valence electrons of the two, and belong to a family in the periodic table .