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Metal communities are highly reductive at high temperatures, combining with oxygen, carbon, gas, and many other elements, and capturing oxygen from some metal vaporizers (such as alumina). At room temperature, the needle combines with oxygen to generate a layer of very thin and dense oxide film. This layer of oxygen film does not react with most of the strong acid and alkali at room temperature, including the king of acid aqua regia, it only reacts with reoxyacid, hot concentrated hydrochloric acid, concentrated sulfuric acid, so titanium reflects the corrosion resistance.
It may react with many elements and compounds at high temperatures. Depending on how they react, these elements can be divided into four groups:
The first class: halogen and oxygen group elements, covalent and ionic bonds with titanium compounds;
The second type: transition elements, hydrogen, wrinkle, build, carbon and ammonia elements, and titanium to form intermetallic compounds and finite solid solutions;
The third category: vauxite, bell, vanadium, Ming, anti elements, and titanium to form infinite solid Body:
The fourth category: natural gases, alkali metals, alkaline earth metals, rare earth elements (except resistance), steel, let, etc., do not react with titanium or basically do not react.