To　improve　the　corrosion　resistance　and　load-bearing　performance　of　titanium　alloy,　the　TiC/Ti　based　composite　coating　with　good　metallurgical　quality　was　prepared　on　the　surface　of　TC4　titanium　alloy　by　using　Diode　laser,　and　the　effect　of　TiC　content　on　the　microstructures　and　properties　of　TiC/TC4　cladding　was　studied.　The　microstructure　and　phase　constitution　of　the　coating　were　characterized　by　scanning　electron　microscope　(SEM)　and　X-ray　diffraction　(XRD),　the　micro-hardness,　corrosion　resistance　and　the　load-bearing　performance　of　the　coatings　were　evaluated.　The　results　show　that　the　cladding　consists　of　TiC,　TiC0.95,　NiTi　2　and　α＇-Ti,　and　the　overall　hardness　of　the　coating　fluctuates　greatly.　The　micro-hardness　in　hard　phases　and　in　the　heat　affected　zone　are　1000-1500HV　and　about　437HV　respectively.　While　the　mass　fraction　of　Ni　coated　TiC　is　not　higher　than　60%,　higher　corrosion　resistance　of　claddings　can　be　obtained　with　the　increase　of　the　mass　fraction　of　Ni　coated　TiC,　reaching　a　maximum　at　60%;　while　the　mass　fraction　of　Ni　coated　TiC　is　not　higher　than　50%,　the　load-bearing　capacity　of　claddings　can　be　improved　with　the　increase　of　the　mass　fraction　of　TiC,　reaching　a　maximum　at　50%.　©　2018,　Editorial　Board　of　Journal　of　Aeronautical　Materials.　All　right　reserved.