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Titanium is a metallic chemical element with chemical symbol Ti and atomic number 22, which is located in the 4th period and IVB group of the periodic table of chemical elements. It is a silvery transition metal, characterized by light weight, high strength, metallic luster and resistance to wet chlorine corrosion.
However, titanium cannot be used in dry chlorine. Even dry chlorine gas below 0℃ will undergo violent chemical reaction to generate titanium tetrachloride, which will be decomposed into titanium dichloride and even burned. Only when the water content in chlorine gas is higher than 0.5% can titanium maintain reliable stability in it. Baidu Encyclopedia-Titanium (Chemical Element)