Abstract: The research progress of boron effects on the grain size, formability and mechanical properties of titanium alloy ingots are summarized. With the addition of 0.1wt% boron, the grain size of titanium alloy ingot is refined significantly and the formability and mechanical properties are improved remarkably. The grain refinement effect of boron on titanium alloy is attributed to the constitutional supercooling mechanism, and the refined grains contributed to the improvement of formability and mechanical properties of the alloys. The present studies of the direct rolling process optimization and the fatigue and creep behavior of boron containing titanium alloys are not deep enough. In future, the research can be focused on the cold rolling formability of these alloys and on the rolling influences on their fatigue and creep performance.