The　effects　of　carbon　nanofibres　(CNFs),　titanium　nanoparticles　(Ti)　and　CNF-Ti　fillers　on　the　water　absorption　and　mechanical　properties　of　the　composites　were　studied.　The　results　showed　that　with　the　increase　in　filler　mass　fraction,　the　water　absorption　and　mechanical　properties　of　epoxy　resin　composites　showed　a　trend　of　first　increasing　and　then　decreasing.　When　6%　CNF-Ti　filler　was　added,　the　water　absorption　and　diffusion　coefficients　of　the　composites　were　reduced　to　2.32%　and　1.04　+/-　0.05　x　10(-6)　m(2)/s,　and　their　tensile　and　impact　strengths　were　improved　by　200%　and　124.55%,　respectively,　compared　with　the　pure　resin.　However,　when　the　filler　was　added　in　excess,　agglomerates　were　generated　inside　the　composite,　which　can　affect　the　performance　of　the　composite　to　a　great　extent.　The　above　experimental　results　were　verified　by　morphology　observations　via　scanning　electron　microscopy.