This　study　deals　with　the　improvement　of　the　wear　resistance　of　aluminum　alloys　by　metal　matrix　composites　(MMCs).　The　latter　were　fabricated　by　implanting　high-speed　solid　particles　into　the　metal　surfaces.　For　that,　stainless　steel　and　Fe-based　amorphous　alloy　particles　were　accelerated　to　the　substrates　using　high-pressure　nitrogen.　The　effect　of　multi-particle　implantation,　particle　material　properties　and　kinetic　energy　at　impact,　and　pre-heating　treatment　of　the　substrate　on　particle　implantation　was　investigated　using　numerical　simulation.　In　addition,　the　effect　of　particle　size　on　the　MMCs　microstructure,　wear　resistance,　strengthening　mechanism,　and　relative　hardness　was　studied.　The　results　showed　that　the　method　simultaneously　achieved　shot　peening　and　metal　matrix　composite strengthening,　that　is,　resulted　in　a　double-strengthening　effect.　Furthermore,　high-speed　particle　implantation　effectively　improved　the　wear　resistance　of　the　substrate:　The　wear　volume　of　Fe-based　amorphous　alloy/Al　MMCs　was　5%　of　the　untreated　aluminum　substrate　and　that　of　stainless　steel/Al　MMCs　14–44%.　It　is　believed　that　laser-assisted　particle　implantation　can　be　used　to　efficiently　increase　the　thickness　and　surface　properties　of　MMCs.　©　2020,　ASM　International.