A bimodal structure in the WE43 alloy was constructed through traditional extrusion. The results suggest that the dominant dynamic recrystallization (DRX) mechanism in the alloy extruded at 300 °C (E300) is twin-induced DRX (TDRX), while the discontinuous DRX (DDRX) prevails when extruded at 330 °C (E330) and 370 °C (E370). For all three kinds of alloys, a decrease in extrusion temperature results in enhanced strength without a significant loss of ductility. Notably, the E300 alloy demonstrates outstanding comprehensive mechanical properties, with a yield strength of 325 MPa, an ultimate tensile strength of 365 MPa, and an elongation of 10.2%. Numerous blocky Mg₁₄Nd₂Y with size of ~100 nm is formed within elongated grains, which contributes to the increased strength of E300 alloy. Additionally, the high-density of I₁ stacking faults and fine blocky precipitates within elongated grains enhance ductility.