TiC and Al 2 O 3 ceramic powders were coated with a Co film, and then the treated powders were hot isostaic pressed to fabricate Al 2 O 3 -TiC-Co (ATC) fine cermet The fracture toughness of the ATC cermet is much higher than that of AT30 with no cobalt film Both ATC and AT30 cermets have about the same hardness The erosion behaviors and mechanisms of ATC and AT30 cermet have been compared It has been shown that the erosion resistance of ATC is better than that of AT30 at both high and low impact angles, especially the latter