The status quo of the research on minor boron addition in γ-TiAl based alloy was summarized. The grain refinement mechanisms of boron addition in γ-TiAl based alloy were stated emphatically; moreover, the factors affecting the boride morphology and their effects on the microstructures and properties of γ-TiAl based alloy were analyzed. Some suggestions for the research on boron addition in γ-TiAl based alloys were proposed