As early as 1791, British chemist Gregor discovered titanium metal when he was studying rutile, but the extraction of elemental titanium failed repeatedly. It will become very active at high temperatures and will react with oxygen, nitrogen, carbon, and other elements in the air during the refining process. It was not until 1910 that American chemist Hunter extracted metal titanium with a purity of 99.9% for the first time. Studies have shown that titanium accounts for about 0.42% of the total weight in the earth's crust, which is 16 times the total of copper, nickel, lead, and zinc. It ranks seventh in the metal world, and there are more than 70 kinds of minerals containing titanium.
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