The worn surface of a modified aluminium-silicon eutectic alloy are examined in order to determine the nature of surface damages. Furthermore, an attempt is made to relate the surface features to the mechanism by which the wear particles are formed. Oblique sections of worn materials are used to examine the extent of subsurface changes through both microhardness measurements and metallography observation. The results indicate that both wear features and mechanism are different when the binary eutectic AL/Si alloys are compared to the modified materials.