High　velocity　arc　spraying　(HVAS)　was　utilized　to　in-situ　deposit　a　series　of　comprising　TiB2　(0~70%　TiB2/Al2O3　in　cored　powder)　composite　coating　on　soft　steel　substrate.　The　microstructure,　phase　characterization　and　properties　of　composite　coatings　were　investigated.　The　results　demonstrate　that　the　microstructure　and　wear　performance　of　composite　coatings　are　influenced　by　metallurgical　transformation　during　spraying　process.　As　a　consequence　of　non-equilibrium　synthesis　by　HVAS　processing,　several　phases　such　as　TiB2,　Al2O3,　FexB,　AlFe3　and　NiAl　in　Fe　matrix　form.　The　anti-friction　of　composite　coatings　is　improved　with　increasing　ceramic　phase　content,　and　the　friction　mass　loss　follows　a　linear　rule　with　ceramic　phase　volume　fraction.　TiB2　decomposition　results　in　reduced　hardness　and　wear　resistance　of　the　coatings.　Coatings　with　Al,　Ni　show　lower　porosity　and　higher　wear　resistance.　Thus,　coatings　of　high　wear　resistance　with　TiB2　phase　can　be　produced　using　high　velocity　arc　spraying.