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Titanium aluminum alloy has many excellent properties and is widely used in various fields, especially in the manufacture of aircraft engines. High-strength titanium-aluminum alloy is an indispensable foundation for the development of the aviation industry. Grain refinement, as an important means of strengthening the performance of titanium-aluminum alloy, can provide the strength of the alloy. In this paper, several methods for refining the solidified structure of Ti-Al alloys have been studied and discussed, and three methods for refining grains have been found: 1. Adding refiners such as boron. 2. Rapidly solidify the alloy 3. Applying electromagnetic pulse field or ultrasound. In addition, the refinement mechanism of boron was studied, and it was found that when the boron content is 0.8% and 1.5%, the alloy has the characteristics of equiaxed crystal solidification. It has also been found that the grain size is a function of the cooling rate. Finally, this article looks forward to the future research on the refinement of the solidified structure of titanium and aluminum alloys.
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