In-situ TiB2particles reinforced ZL203alloy composites were fabricated successfully by the re-action of halide salts with aluminum melt.During fabrication process

pulsed magnetic field（PMF）was employed to improve the wear resistant properties of the composites.The dry sliding wear behavior of the matrix alloy and the composites under various loads were examined.The results show that

with the addition of TiB2particles

the solidification structure of the composites is refined apparently

and it is further refined by imposing PMF in the fabrication process.The wear resistance of the composites is sig-nificantly superior to that of the matrix alloy.And the wear resistance of composites under a heavy load is further improved by imposing PMF in the fabrication process.By comparison with the composites fab-ricated without imposing PMF

the critical transition load from mild wear to severe wear is increased from 80Nto 100N.The analysis of worn-out surfaces indicates that the wear mechanism of the matrix alloy is characterized by the co-action of severe adhesive wear and delamination wear

and it mainly ex-hibits abrasive wear with slight adhesive wear in the composites without PMF

and abrasive wear is dominant in the composites with PMF treatment.