Hot workability of Ti-6Al-4V alloys was examined by a hot stage tensile test and hot rolling using a bench scale bar mill. As-cast as well as (α+β) rolled materials were used. Embrittlement occurs between 700 and 950°C in the coarse grain specimens possibly due to the existence of low stress level of β phase along prior β grain boundary. Lateral spread coefficient of this alloy during a pass rolling is larger than Si-Mn steel and shows unique temperature dependence.
