Specification 1: GB 228 Metal Tensile test method 2: GB/T 3620.1 Titanium and Titanium alloy grade and chemical composition 3: GB/T 3620.2 Titanium and Titanium alloy processed product chemical composition and composition allowable deviation 4: GB 4698 Sponge titanium, titanium and iron alloy chemical analysis method Processing Hot forging Forging process in metal above the recrystallization temperature. Hot rolled Under the above the recrystallization temperature of the rolling process. Cold rolling Plastic deformation temperature lower than the temperature of the rolling process. Annealing The metal slowly heated to a certain temperature, keep enough time, then cooling with appropriate speed (usually slow cooling, sometimes is controlled cooling of a metal heat treatment process. Pickling Parts in aqueous solution of sulfuric acid and so on, to remove metal oxides on the surface of the film. Is plating, enamel, before or after processing the middle of rolling processing