Abstract: SHS joining of TiAl intermetallic to TiB₂ cermet was studied.The study concentrated on the effect of composition of interlayer on TiAl/TiB₂ cermet joint.It was shown that the releasing heat became different when using different interlayer.As a result,the microstructure of TiAl/TiB₂ cermet joint changed.The TiAl₃ reaction layer in TiAl/interlayer interface and the poor-Cu layer appeared in TiB₂/interlayer interface became wider with the increase of reaction releasing heat.The loop structure in interlayer changed correspondingly.