Titanium material selected for titanium stop valve is a metal with high chemical activity. It has excellent corrosion resistance to many corrosive media. The reason is that titanium has a good affinity with oxygen, and it is very easy to react with oxygen to form a solid and dense passive oxide film on its surface. The large-diameter titanium stop valve has compact structure, reasonable design, good valve rigidity, smooth channel and small flow anion coefficient. The driving mode can be divided into dynamic, electric and gear transmission. It has been widely used in chlor alkali industry, soda ash industry, pharmaceutical industry, fine chemical industry, basic organic acid and inorganic salt production, nitric acid industry, etc.