A thick-wall part of TA15 titanium alloy is formed by the technology of laser rapid forming combined with continuous point forging. The influence of different annealing temperatures on the microstructures and the tensile properties test at room temperature of the TA15 alloy part formed by the technology of laser rapid forming combined with continuous point forging is investigated. The analysis of size of the plastic deformation zone formed by continuous point forging and the microstructure formation mechanism of the as-formed TA15 alloy part is given. The reason that the lamellar microstructure of the as- formed TA15 alloy part transform into the equiaxed microstructure is also explained. The results show that the volume fraction of equiaxed αgrain in the annealed structure of TA15 alloy and the size of the equiaxed α grain increase with annealing temperature increasing. The results also show that the strength of the annealed TA15 alloy reduce, and at the same time its ductility increases with annealing temperature increasing.