The Short Introduction of Titanium
Titanium, chemical symbol Ti, atomic number 22, is a chemical element, which is located in the fourth cycle of the chemical periodic table, group IVB. Titanium is a silver-white transition metal characterized by light weight, high strength, metallic luster, and resistance to wet chlorine gas. However, titanium cannot be used in dry chlorine. Even if the titanium is dry chlorine gas at a temperature below 0 °C, a severe chemical reaction occurs, and titanium tetrachloride is formed, which is decomposed to form titanium dichloride and even burns. Titanium maintains reliable stability only when the water content in the chlorine gas is higher than 0.5%.
Titanium is considered to be a rare metal because it is dispersed and difficult to extract in nature. Titanium is relatively rich and ranks tenth among all elements. Titanium ore mainly consists of ilmenite and rutile, which are widely distributed in the earth's crust and lithosphere. Titanium also exists in almost all living things, rocks, water bodies and soils. The extraction of titanium from the main ore requires the use of the Kroll method or the Hunter method. The most common compound of titanium is titanium dioxide, which can be used to make white pigments. Other compounds also include TiCl4 and TiCl3.