通过不同总压缩比的实验室热轧、微观组织和析出相表征及力学性能测试等实验，研究了热轧变形量对经过轧后热处理的高钛耐磨钢组织和力学性能的影响。随着轧制变形量的增大，高钛耐磨钢的强度、韧性和塑性均有提高：屈服强度、抗拉强度和总延伸率从压缩比为3∶1时的1202 MPa、1437 MPa和7.4%分别提高到压缩比为30∶1时的1311 MPa、1484 MPa和9.9%，而室温Charpy冲击功从压缩比为3∶1时的11 J大幅提高到压缩比为10∶1时的24 J。随着轧制变形量增大，铸态析出的微米级网状TiC逐渐细化和均匀化，同时尺寸小于15 nm的TiC颗粒占比增加，热处理后的原奥氏体晶粒尺寸则不断减小。通过对高钛耐磨钢各种强化方式的定量分析表明，采用沉淀强化和位错强化均方根叠加方式计算得到的高钛耐磨钢屈服强度与实测值吻合较好，高钛耐磨钢屈服强度随轧制压缩比增加而上升主要是由于晶界强化和沉淀强化作用增加所致。高钛耐磨钢的韧性和塑性随强度的提高不降反升，主要是因为大颗粒TiC在轧制变形过程中发生细化和均匀化。

To improve the wear performance of steel without increasing its hardness, a high-Ti wear-resistant steel was reinforced with TiC particles. The effects of hot rolling deformation on the microstructure and mechanical properties of the wear-resistant steel containing 0.61%Ti after quenching and tempering were studied in hot rolling experiments with different reduction ratios. The steel products were subjected to microstructure and precipitate characterization and mechanical-property tests. Increasing the rolling deformation improved the strength, toughness, and plasticity of the tested steel. The yield strength, tensile strength, and total elongation were increased from 1202 MPa, 1437 MPa, and 7.4%, respectively, at a reduction ratio of 3∶1 to 1311 MPa, 1484 MPa, and 9.9%, respectively, at a reduction ratio of 30∶1. Meanwhile, increasing the reduction ratio from 3∶1 to 10∶1 remarkably increased the absorbed energy at room temperature (obtained in a Charpy impact test) from 11 J to 24 J. As the rolling deformation increased, the micron-sized net-like TiC particles that precipitated during solidification were gradually refined and homogenized, and the prior austenite grain size was also refined. Next, the strengthening mechanisms of the steel were quantitatively analyzed. The yield strength, calculated by adding the root mean squares of the dislocation and precipitate strengthening values, well agreed with the measured yield strength. The increasing yield strength of the tested steel at higher rolling reduction ratios is mainly attributable to increased grain-boundary strengthening and precipitation strengthening. As the strength of the steel increased, the toughness and plasticity also increased, mainly because the large TiC particles were refined and homogenized during the rolling deformation.