This paper introduces the meaning of cryogenic treatment technology and its modification effect on aluminum alloy

magnesium alloy

copper alloy and high-entropy alloy

and focuses on the research progress and modification mechanism in the deep cryogenic treated titanium alloy. It shows that cryogenic treatment has a significant modified effect on the microstructure and properties of titanium alloy. It can refine grain size

improve dislocation density

promote the formation of twin and sub-crystal structure

promote phase transformation and phase precipitation

and promote the formation of texture

and enhance the strength and toughness of titanium alloy through the mechanism of fine grain strengthening

dislocation strengthening

precipitation strengthening

texture strengthening and so on. The strength and toughness of titanium alloy can be improved synchronously by optimizing the parameters of deep cryogenic treatment. In conclusion

deep cryogenic treatment on titanium alloy is a new method and technology for solid state treatment with “high performance

high quality

low cost and low pollution” characteristic.