Agglomerated　TiB2　particle　and　network-like　structure-reinforced　titanium　matrix　composite　coatings　were　prepared　by　laser　cladding　of　the　Ni　+　TiB2　+　Ti　preplaced　powders　on　Ti-6Al-4V　alloy.　The　network-like　structure　mainly　consisted　of　NiTi　and　Ni3Ti.　Through　the　experiment,　it　was　found　that　the　size　of　agglomerated　particle　gradually　decreased　with　the　increase　of　Ti　content,　but　the　number　of　the　network-like　structure　first　increased　and　then　disappeared.　In-situ　reaction　competition　mechanism　and　the　formation　of　network-like　structure　were　discussed.　The　average　micro-hardness　gradually　decreased　with　the　increase　of　Ti　content,　but　the　average　fracture　toughness　gradually　increased.　Meanwhile,　the　wear　resistance　of　the　coatings　is　higher　than　that　of　the　substrate,　but　the　wear　loss　of　the　coatings　is　gradually　increased　with　the　increase　of　Ti　content.