In this paper, the morphology and texture characteristics of the original β-grains in the deposited samples of TC21 titanium alloy obtained by laser solid forming (LSP) were studied, and the application of LSP in high performance metal processing was analyzed. The results show that the microstructure of TC21 titanium alloy is typical epitaxial growth columnar β grain, and the fiber texture characteristics are obvious; along the direction of deposition height, the size, morphology and volume fraction of α phase exist obvious inhomogeneity, which indicates that the precipitation of α phase in TC21 titanium alloy is more sensitive to the thermal history of forming process. When there is a transition to β, the phase selection occurs. In the absence of any intervention, the thermal history is different when the deposition position is different. Because of the lower temperature at the bottom of the deposited sample, the cooling rate is faster, and the temperature of the sample increases, α ′phase decomposes into fine α + β phase.