Based　on　previous　work,　the　abrasive　wear　resistance　of　Al2O3/steel　composites　with　different　Al2O3　particle　volume　fractions　(VOF)　at　900°C　was　investigated.　It　can　be　found　from　the　experimental　results　that　a　suitable　particle　volume　fraction　is　important　to　protect　the　metal　matrix　from　wear　at　elevated　temperature.　The　less　the　particle　VOF,　the　poorer　the　abrasive　wear　of　the　composites　due　to　bulk　matrix　easily　worn　off　by　grits.　However,　the　more　the　particle　VOF,　the　poorer　the　abrasive　wear　of　the　composites,　too.　The　reason　is　that　Al2O3　particles　are　easily　dug　out　by　grits　during　wearing.　When　the　particle　VOF　is　39%,　the　wear　resistance　of　test　composites　is　excellent.