Ceramic particles preforms are synthesized by vacuum sintering reaction between Al2O3 particles and active elements Ti and Ni. The surface of preforms sintered by Al2O3 and Ti consists of block‐shaped a‐Ti and fibrous TiO. As the content of Ti in preforms increases, the compressive strength of preforms rises first and then falls and the porosity decreases gradually. The preforms sintered of Al2O3 and Ni–Ti have much higher compressive strength, because of the compact sintered shell outside Al2O3 and the sintered necks between particles. Then the preforms/high‐Cr cast iron composite is fabricated by infiltration casting process. The three‐body abrasive wear resistance of composite is over 12 times higher than Cr15, owing to the protection of extruded Al2O3 and tightly bonded composite interface.