An　active　ternary　brazing　filler　metal　of　Al-12Si-1Ti　with　a　melting　temperature　range　of　851-856　K　was　developed　by　adding　Ti　into　Al-Si　system　alloy　to　improve　the　wettability　of　Al-Si　system　filler　metal　on　pure　aluminum　matrix　composite　reinforced　with　short　alumina　fiber　(Al2O3sf/Al).　The　wetting　behavior　of　the　developed　Al-12Si-1Ti　and　conventional　Al-12Si　foils　were　compared　using　sessile　drop　test　at　883　K　for　300,　900,　and　1800　s　in　flowing　argon　atmosphere.　After　shorter　retardation　periods,　the　interfacial　gaps　between　Al-12Si-1Ti　foil　and　matrix　(M/M)　micro-interfaces　could　disappear　more　easily　than　the　case　of　using　conventional　Al-12Si　foil.　Moreover,　the　thickness　of　residual　Al-12Si-1Ti　foil　also　decreased　faster　than　that　of　conventional　Al-12Si　foil.　Especially,　the　interfacial　gaps　between　reinforcement　and　filler　metal　(R/M)　micro-interfaces　could　be　eliminated　for　the　developed　Al-12Si-1Ti　foil,　while　for　conventional　Al-12Si　foil　the　interfacial　gaps　at　R/M　micro-interfaces　could　not　be　eliminated,　although　Si　atoms　could　penetrate　into　the　composite　through　bonded　M/M　micro-interfaces.　These　results　showed　that　the　Ti　addition　could　not　only　accelerate　the　wetting　at　M/M　micro-interfaces,　but　also　eliminate　the　interfacial　gaps　at　R/M　micro-interfaces.