The　effect　of　nano　and　micron　powders　in　cored　wires　on　formation　and　properties　of　Fe-TiB2　composite　coatings　made　by　high　velocity　arc　spraying　(HVAS)　were　investigated.　Six　cored　wires　filled　with　different　average　ceramic　particle　sizes　(20-40　nm,　2　μm,　and　420　μm　)　and　fine　powder　contents　(0,8,　16,　20,　24,　32wt.%)　were　prepared.　The　flattening　behavior　of　sprayed　particles　was　characterized　and　compared　by　using　OM　and　3D　surface　profiler.　The　microstructure　of　the　coatings　and　phase　compositions　were　characterized　by　means　of　SEM,　EDAX　and　XRD.　Microhardness　and　wear　resistance　were　evaluated　and　wear　scratch　was　observed　by　laser　confocal　scan　microscopy.　The　results　show　that,　with　increasing　the　percentage　of　fine　ceramic　powders,　the　shape　of　the　flat　particles　transfers　from　a　distorted　heavy　splash　to　a　disk-like　shape,　with　little　splash,　and　the　coatings　porosity　decreases.　When　TiB2　powder　size　is　less　than　2　μm,　Fe-TiB2　composite　coatings　reveal　dispersion　of　fine　ceramic　particles　and　exhibit　the　best　wear　resistance.