To　enhance　the　wear　resistance　of　the　Ti6Al4V　alloy　surfaces,　four　TiB-reinforced　titanium　matrix　composite　(TMC)　coatings　were　in-situ　synthesized　via　laser　cladding.　This　study　systematically　explored　the　effects　of　varying　TiB2　contents　(5,　15,　25　and　35　wt%)　on　the　microstructure,　hardness　and　wear　resistance　of　the　coatings.　The　results　revealed　that　all　TMC　coatings　contained　in-situ　synthesized　TiB　reinforcements,　residual　TiB2,　α-Ti　matrix　and　small　amounts　of　β-Ti.　The　addition　of　5　wt%　TiB2　(hypoeutectic　region)　formed　fine　eutectic　TiB　whiskers　(TiBw)　as　reinforcements.　At　higher　TiB2　contents　(hypereutectic　region),　hollow　columnar　primary　TiB　and　eutectic　TiBw　were　formed.　The　hardness　of　the　TMC　coatings　exceeded　that　of　the　Ti6Al4V　substrate　and　increased　with　increasing　TiB2　content.　Nanoindentation　tests　indicated　that　the　residual　TiB2　and　primary　TiB　had　higher　hardness　and　elastic　modulus　than　eutectic　TiBw　and　Ti　matrix.　The　wear　resistance　of　the　four　TMC　coatings　was　3–4　times　greater　than　that　of　the　Ti6Al4V　substrate,　and　samples　with　higher　TiB₂　additions　are　more　wear　resistant.　Abrasive　wear　was　identified　as　the　dominant　wear　mechanism　and　the　improved　wear　resistance　can　be　attributed　to　the　reinforcing　effects　of　residual　TiB₂　and　primary　TiB.　©　2024　Elsevier　B.V.