Microstructure and properties of a titanium alloy by metal injection molding

Titanium alloy parts were prepared by metal injection molding, binder was removed from the parts by solvent debinding process, and the brown parts were densified in vacuum atmosphere. The as-sintered specimens were treated through hot-isostatic pressure at 960℃ and 140 MPa, and titanium alloy compacts were annealed at 720-760℃ for 1-1.5 h. SEM observations showed that the titanium alloy had a uniform dial microstructure with many equiaxed a grains and a little β grains. XRD results indicated that Ti₃Al phase was found in the alloy when the annealing temperature was higher than 800℃.