Al-5Ti-1B　refiner　was　successfully　prepared　by　melt　reaction　method.　Through　the　thermodynamics　calculation,　the　initial　reaction　temperature　was　determined.　The　influence　of　reaction　temperature　on　microstructure　and　absorption　rate　of　the　alloy　was　investigated.　The　phase　and　microstructure　of　the　alloy　were　observed　by　X-ray　diffraction,　scanning　electron　microscope　and　energy　dispersive　spectrometer.　The　Al-5Ti-1B　refiner　was　extruded　at　high　temperature　to　wire　with　the　diameter　of　9.5mm,　and　then　the　refinement　experiment　was　carried　out　on　pure　aluminium.　The　results　indicate　that　the　refiner　consists　of　TiB2,　TiAl3　and　α-Al,　and　the　microstructure　prepared　at　850　is　the　optimum　and　the　absorption　rate　of　Ti　and　B　matches　the　best.　The　TiAl3　and　TiB2　phases　distribute　homogeneously　in　the　matrix　after　extrusion.　When　adding　0.2%(mass　fraction)　of　Al-5Ti-1B　refiner,　the　grain　size　of　pure　aluminium　reduces　from　3.99mm　to　0.45mm.　©　2017,　Journal　of　Materials　Engineering.　All　right　reserved.