This study investigated the effects of thermomechanical processingThermomechanical processing on AA5083 by comparing the microstructuresMicrostructure and properties of alloys with and without Sc/Zr additions. The results revealed that a minor addition of Sc (0.10 wt.%) consistently enhanced the strength and recrystallizationRecrystallization resistance across different process conditions, primarily due to the strengthening and pinning effects of nanosized L12-Al3(Sc,Zr) precipitatesPrecipitate. Lowering the hot rolling temperature by 100 °C (from 500 °C to 400 °C) improved the yield strength of the Sc-containing alloy by 39% from 209 to 291 MPa in the O-temper, which is attributed to the decreased coarsening and dissolution of those precipitatesPrecipitate. Furthermore, the yield strength of the Sc-containing alloy in the H321-temper, rolled at the lower hot rolling temperature, reached 305 MPa, representing a 33% improvement over the Sc-free base alloy. Moreover, the minor addition of Sc doubled the recrystallizationRecrystallization temperature to 500 °C, compared to 250 °C for the base alloy. This higher recrystallizationRecrystallization temperature results from the L12-Al3(Sc,Zr) nanoparticles effectively hindering dislocation movement and subgrain boundary migration. The findings show that microalloying AA5083 with just 0.10 wt% Sc significantly enhances its mechanical propertiesMechanical properties and recrystallizationRecrystallization resistance, but that the extent of these improvements can vary significantly depending on the thermomechanical processingThermomechanical processing conditions.