The present investigation has been made on the influence of temperature on the workability behavior, stresses and hardness of sintered Al-4%B4C at a strain rate of 0.1s-1 during upsetting. Al-4% B4C preforms were prepared with 90% of initial preform density and sintered at 550±10oC about 60 min. These sintered preforms were compressed in a hydraulic press at a strain rate of 0.1 s-1 until the initiation of the cracks appears on the free surface. The various stresses (σz, σθ, σm, σeff), formability stress index (β) and stress ratio parameters (σz/σeff, σm/σeff, σθ/σeff) were calculated and correlated with the true axial strain (Ez). Also the effect of different deformation temperatures on the hardness of Al-4%B4C preforms was studied in detail. © 2017 The Authors.