熔炼了2种钛含量（质量分数分别为0.09%，0.21%）的钛-硫易切削钢，并在1 200 ℃进行锻造，对比研究了铸态和锻造态试验钢组织中硫化物形貌、尺寸、数量以及试验钢的力学性能。结果表明：在铸态试验钢中，硫化锰大多为近似短棒状和球状，沿晶界呈链状或网状分布，锻造后硫化锰沿着锻造方向伸长，统计得到的长宽比增大，单位面积内数量减少；钛含量的提高使单位面积内硫化锰数量增多；铸态试验钢拉伸断口主要特征为解理台阶与河流状花样，断裂方式为脆性断裂，锻后的拉伸断口为解理和韧窝混合型形貌，断裂方式为韧性断裂；锻造态试验钢的拉伸性能和冲击韧性与铸态相比均有明显改善，锻造有助于提高钛-硫易切削钢的力学性能。

Two titanium-sulfur containing free-cutting steels with titanium content (0.09wt% and 0.21wt%) were smelted and forged at 1 200 ℃. The morphology, size and quantity of sulfides in the structure and the mechanical properties of the as-cast and forged test steels were compared and studied. The results show that in the as-cast test steel, most of the manganese sulfides were short-rod-like and spherical, and distributed in chains or nets along the grain boundaries. After forging, the manganese sulfides extended along the forging direction, the statistically obtained length-width ratio increased, and the quantity per unit area decreased. The increase of titanicum content increased the quantity per unit area of manganese sulfides. The tensile fracture surface of the as-cast test steel showed cleavage terrace and river pattern, and the fracture mode was brittle fracture. The tensile fracture after forging showed cleavage and dimple mixed morphology, and the fracture mode was ductile fracture. The tensile properties and the impact toughness of the forged test steel were better than those of the as-cast steel, indicating forging was helpful to improve the mechanical properties of the titanium-sulfur containing free-cutting steel.