To elucidate the complex behavior and self-inconsistent results derived from shock recovery experiments, fine grained AMX602 magnesium alloy was shock compressed to stable Hugoniot stresses of approximately 2.0 GPa and 7.0 GPa, respectively along the plate normal and extrusion directions, then released back to ambient conditions. Using time-resolved in-situ synchrotron X-ray diffraction shock experiments, we report the real-time observation of twinning-detwinning in this fine grained AMX602 magnesium alloy. Texture evolution via in-situ X-ray diffraction show significant twinning during shock compression and detwinning during stress release. These findings were corroborated through the intensity interchange between the parent and twin reflection pair (0002) – basal and (10-10) – prismatic, which occur during {10-12}〈10-1-1〉 extension twinning in materials with hexagonal closed pack lattice structure. These results not only provide a strong insight on the complex twinning-detwinning behavior of this textured fine grained AMX602 magnesium alloy but also helped in bridging the existing knowledge gap in shock recovery experiments.