Titanium is an inert metal with the chemical symbol ti and atomic number 22. It is a silver metal with a density of 4.51 and a melting point of 1668℃. Its reserves in the Earth's crust are very rich, ranking fourth after iron, aluminum, and magnesium, and more than ten times the sum of commonly used metals such as copper, nickel, lead, and zinc. The industrial production of titanium is made from ilmenite, titanium iron ore, and titanium magnetite, and it was not until the 1940s that metal titanium with industrial significance was produced due to its difficulty in separation and extraction. Therefore, titanium is generally referred to as a rare light metal. Due to the need for different titanium and titanium alloy products in different fields, they are processed into shapes that can be deeply processed, such as plates, bars, tubes, belts, and wires to meet the needs of different fields. Titanium sheets, titanium rings, and titanium forgings are the most widely used.
The surface of the titanium sheet should be smooth and have a metallic color. The sheet with sandblasted surface can be delivered. The titanium sheet surface allows for slight blackening and local water stains; local defects, scratches, depressions, and pits with a depth not exceeding half of the thickness tolerance are allowed, but the minimum thickness should be guaranteed. The surface does not allow macro defects such as cracks, peeling, oxide skin, crushing, metal and non-metal inclusions, and alkaline washing marks. Local defects along the rolling direction of the titanium sheet can be removed, but the thickness of the cleared plate should not be less than the minimum allowed thickness. In addition, there should be no delamination phenomenon on the titanium sheet.
Titanium and titanium alloys have low density and high tensile strength. Their specific strength is almost the highest among metal materials between -253 and 600 degrees Celsius. A thin and hard oxide can be formed in a suitable oxidizing environment, and the material film has excellent corrosion resistance. Moreover, it is non-magnetic and has a small linear expansion coefficient. This makes titanium and its alloys first become important aerospace structural materials, and then extend to shipbuilding, chemical industry and other fields, and have developed rapidly. Especially in the chemical industry, titanium sheet products are increasingly used in industries such as petroleum and chemical, fibers, pulp, fertilizers, electrochemistry, and seawater desalination, as well as exchangers, reactors, synthesizers, and high-pressure reactors.
With the development of science and technology, the application of titanium sheets is becoming more and more extensive, such as medical, automotive, sports, etc., which truly reflects that titanium, as a light metal, has increasingly excellent properties. It has been recognized and decided that it will replace other metals and enter our production and application fields at the fastest speed.