The grain growth behavior in the β phase field and its effects on the tensile properties were investigated in a TC19 titanium alloy forging billet. The experimental results show that the growth behavior of the β grain can be effectively described by the Beck equation, and the grain growth kinetics exponents are found to be 0.517, 0.521, and 0.536 at 975 ℃, 990 ℃, and 1 005 ℃, respectively. Moreover, the apparent activation energy Q for grain growth is about 226.9 kJ/mol based on the Arrhenius relation.The tensile performance shows that the size of the β grain has little influence on room temperature strength in this work, the typical quasi-cleavage fracture morphology is dominant.