Titanium gold generally refers to titanium. Titanium is a metallic chemical element with chemical symbol Ti and atomic number 22, which is located in the fourth 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.
Titanium is considered as a rare metal because it is dispersed in nature and difficult to extract. But it is relatively rich, ranking tenth among all elements. Titanium minerals mainly include ilmenite and rutile, which are widely distributed in the crust and lithosphere. Titanium also exists in almost all living things, rocks, water bodies and soil. Extracting titanium from main ores requires Kroll method or Hunter method. The most common compound of titanium is titanium dioxide, which can be used to make white pigments. Other compounds include titanium tetrachloride (TiCl _ 4), which is used as a catalyst to make smoke screen for air cover, and titanium trichloride (TiCl _ 3), which is used to catalyze the production of polypropylene.
The stratum ten kilometers thick on the earth's surface contains six thousandths of titanium, which is 6 1 times more than copper, ranking tenth in the earth's crust (the order of elements in the earth's crust: oxygen, silicon, aluminum, iron, calcium, sodium, potassium, magnesium, hydrogen and titanium). Grab a handful of soil from the ground, and it contains a few thousandths of titanium, which is more than one in the world.
There are hundreds of millions of tons of sand and gravel on the earth. Titanium and zirconium, two minerals heavier than gravel, are mixed in the gravel. After millions of years of day and night elutriation, the heavier ilmenite and zircon sand were washed together, forming pieces of titanium ore and zircon sand on the long coast. This seam is a kind of black sand, usually a few centimeters to dozens of centimeters thick. Titanium has no ferromagnetism, so nuclear submarines built with titanium need not worry about the attack of magnetic mines.