The symbol Ti, atomic number 22, is titanium.

 It is light, hard, rarely corrodes. It is a post transition metal element with a silver-white metallic luster. Pure titanium is mostly used as an alloy except where low material properties require strong corrosion resistance.



 Titanium is widely distributed in many minerals, mostly from ilmenite(left) and rutile(right). It is found with two allotropy and five natural isotopes.

 Titanium's most important properties are excellent corrosion resistance and low proportion, weighing only 60 percent of steel. Titanium's physical and chemical properties are similar to ziroconium.


 Titanium was named menaccanite in 1791 when British geologist and pastor William Gregor(left) discovered it in a river stream. In 1785, Martin H.Klaproth(right) of Germany discovered Titinium in rutile and named Titian. The elements found by these two are identical.


 Titanium is rich enough to be the fourth metal element in the crust, but the reason why it is low use, because it is difficult to smelter minerals that TiO₂ is the main ingredient.

 It is light due to its small proportion, and its strength is similar to that of iron with only about half weight of iron.

 Passivity film is formed in water or air near room temperature, and the nest to gold or platinum has excellent corrosion resistance.

 The melting point is very high, about 1679 degrees.