1, high thermal strength, using temperature hundreds of degrees higher than that of aluminum alloy, still maintaining the required strength at moderate temperature, and working at 450 ~ 500℃ for a long time. These two kinds of titanium alloys still have high specific strength in the range of 150℃ ~ 500℃, while the specific strength of aluminum alloys decreases obviously at 150℃. The working temperature of titanium alloy can reach 500℃, while that of aluminum alloy is below 200℃.

2, the corrosion resistance is good, titanium alloy works in humid atmosphere and seawater medium, and the corrosion resistance is far better than that of stainless steel; Especially strong resistance to pitting corrosion, acid corrosion and stress corrosion; Excellent corrosion resistance to alkali, chloride, chlorine, nitric acid, sulfuric acid and other organic substances. However, the corrosion resistance of titanium to reducing oxygen and chromium salt medium is poor.