Preparation of epoxy/SiO2-TiO2 composites is investigated in this paper. The products are characterized by FT-IR spectroscopy. Results of FT-IR spectroscopy and atom force microscope (AFM) demonstrated that epoxy chains have been covalently bonded to the surface of the SiO2-TiO2 particles. The particles sized of SiO2-TiO2 are about 20-50 nm, which characterized by AFM. The properties of composites such as impact strength, flexural strength, tensile strength and ring-on-block wear are also investigated. Dry sliding wear tests showed that the SiO2-TiO2 particles could improve the wear resistance of the epoxy matrix even though the content of the SiO2-TiO2 particles was at a relatively low level (1.95-2.65 wt%). This makes it possible to develop novel type of epoxy-based materials with improved wear resistance for various applications. The worn surface was observed by scanning electron microscopy (SEM), and mechanisms for the improvement are discussed in this paper (C) 2005 Springer Science + Business Media, Inc.