Ni-based　composite　coatings　reinforced　with　in-situ　titanium-doped　NbC　particles　were　fabricated　on　Cr12MoV　steel　plate　utilizing　laser　cladding　technology.　The　microstructure　and　mechanical　properties　of　the　coatings　were　investigated,　as　well　as　the　effect　of　different　Nb/Ti　mole　ratio　on　the　distribution　characteristics　and　formation　mechanism　of　titanium-doped　NbC　particles.　The　(Ti,　Nb)C　distributed　homogeneously　in　the　coatings.　According　to　the　EBSD　results,　the　coating　with　Nb/Ti　=　1:1　showed　strong　texture　characteristics,　and　the　grains　size　of　the　bottom　was　smaller　due　to　faster　heat　dissipation.　As　lower　surface　energy　and　lattice　misfits　of　TiC　and　NbC,　(Ti,　Nb)C　was　easily　synthesized　and　the　pre-formed　TiC　particles　were　the　most　favorable　attachment　sites.　According　to　the　analysis　results　of　SEM,　EPMA　and　TEM,　when　Nb/Ti　=　1:1,　(Ti,　Nb)C　was　a　multiple　carbide　with　a　NbC　structure.　In　addition,　the　various　morphologies　of　reinforcing　phases　were　relevant　to　the　solidification　rates,　temperature　gradient　and　composition　distribution.　The　micro-hardness　and　wear　resistance　of　coating　with　Nb/Ti　=　1:1　exhibited　significantly　improvement　compared　with　other　coatings.