TiB2/TiB　gradient　coating　has　been　fabricated　by　a　laser　cladding　technique　on　the　surface　of　a　Ti-6Al-4V　substrate　using　TiB2　powder　as　the　cladding　material.　The　microstructure　and　mechanical　properties　of　the　gradient　coating　were　analyzed　by　SEM,　EPMA,　XRD,　TEM　and　an　instrument　to　measure　hardness.　With　the　increasing　distance　from　the　coating　surface,　the　content　of　TiB2　particles　gradually　decreased,　but　the　content　of　TiB　short　fibers　gradually　increased.　Meanwhile,　the　micro-hardness　and　the　elastic　modulus　of　the　TiB2/TiB　coating　showed　a　gradient　decreasing　trend,　but　the　fracture　toughness　showed　a　gradient　increasing　trend.　The　fracture　toughness　of　the　TiB2/TiB　coating　between　the　center　and　the　bottom　was　improved,　primarily　due　to　the　debonding　of　TiB2　particles　and　the　high　fracture　of　TiB　short　fibers,　and　the　fracture　position　of　TiB　short　fiber　can　be　moved　to　an　adjacent　position.　However,　the　debonding　of　TiB2　particles　was　difficult　to　achieve　at　the　surface　of　the　TiB2/TiB　coating.　(C)　2016　Elsevier　Ltd.　All　rights　reserved.