研究了Mg-xZn-0.5Er (x = 0.5、2.0、3.0、4.0，质量分数，%)合金板材在轧制过程中微观组织及织构的演变规律，并探讨了织构及第二相对合金室温成形性能的影响规律。结果表明，随着Zn含量的增加，合金提前发生了完全动态再结晶，在后续轧制过程中细小的动态再结晶晶粒长大并在应力的作用下被拉长，其显微组织由细小的等轴晶粒和粗大的变形晶粒组成，织构强度增大。当合金组织内仅存在细小弥散的第二相时，板材成形性能主要受板材基面织构影响；当合金组织内存在粗大第二相时，板材成形性能受板材基面织构和第二相共同影响，且当第二相含量较高时，第二相对成形性能的恶化作用会大于织构弱化所带来的积极作用。

As lightweight requirements rise in transportation, aerospace, and other industries, magnesium alloys have a great application prospect. However, the low formability capabilities of magnesium alloys lead to a severe limit in applications. At present, there are many reports on the influences of texture and second phases on the formability of magnesium alloys at room temperature. Nevertheless, the dominant factors affecting the formability performance of magnesium alloys at room temperature are not clear. In this study, the development of the microstructures and texture of Mg-xZn-0.5Er (x = 0.5, 2.0, 3.0, 4.0, mass fraction, %) alloy sheets were studied, and the impact of the texture and second phases on the formability of these sheets were also investigated. The findings showed that the increase in Zn addition led to an early and complete dynamic recrystallization (DRX) in Mg-Zn-Er alloys sheets, and these recrystallized grains would expand significantly during subsequent hot rolling processes. These recrystallized grains with a large size were typically elongated and then helped to create a strong basal texture. Thus, it was discovered that the microstructures of these sheets were typically made up of equiaxed and elongated grains. The formability performance of these sheets was strongly related to the size of the second phases and the texture. The formability of the sheets containing microscopic second phases mainly depended on the basal texture, while the formability of the sheets which contained coarse second phases was mostly influenced by the second phases and basal texture. Particularly, when the component of the coarse second was larger, the formability would get more inferior due to the predominant role of the second phase at room temperature.