The effects of solution temperature on the microstructure and mechanical properties were investigated of the core-shell structured Ti@（Al-Si-Ti）

p

/A356Al matrix composites prepared by powder thixoforming.The results reveal that with the solution temperature increase

the primary phase particles are coarsened gradually and the shape become irregular.Eutectic Si phase is continuously dissolved into the matrix

and the residual eutectic Si particles are spheroidized and then coarsened.Ti core of the coreshell structured reinforced particles is continued to react while the shell layer is thickened

and the phase in shell is transformed from the"

1

phase to the（Al

Si）

3

Ti phase.The mechanical properties of the composites are increased firstly and then reduced with the solution temperature increase.At the solution temperature of 530℃

the tensile strength

yield strength

elongation and Vickers hardness of the composites reach 386 MPa

297 MPa

9.6%and 94.8HV

respectively.