Titanium alloy is sensitive to strain rate, so motions of rolls are crucial to the hot rolling process of titanium alloy large rings. In the study, firstly, the relative velocity v r was proposed to synthesize motion parameters of rolls, including the rotational velocity of the driver roll n 1 and the feed rate of the idle roll v, and then the reasonable range of v r was determined analytically based on the stable forming condition. Secondly, a reliably coupled thermo-mechanical 3D-FE model of the process was developed in the dynamic explicit code ABAQUS/Explicit. Finally, the effect of v r on the process was studied using FE simulation. The results obtained show that although increasing v r by two different ways, i.e., by decreasing n 1 or by increasing v, makes the feed amount per revolution Δh i increase, not all of their effects on the process are in agreement, such as for the nonuniformity of strain distribution. An appropriately larger value of v r is helpful to improve the end-plane quality and make strain and temperature distributions in a deformed ring more uniform, but has an adverse influence on the roll force.