Titanium-containing blast furnace slag in China has nearly 100 million tons of accumulation, not only occupy a lot of land and pollute the environment, and because it contains a lot of titanium resources and other valuable components have not been effectively used, resulting in a serious waste of resources. In this paper, the structural properties of titanium-containing blast-furnace slag, the principles and advantages of wet, fire and selective precipitation of titanium components were reviewed. It is suggested that improving the viscosity and other physical properties of the slag, increasing the diffusion rate of titanium components during crystallization, expanding the crystallization temperature difference between titanium components and other components, and introducing crystal seeds or more effective auxiliaries to increase the crystalline particle size of titanium components are the key directions of future research.