Previous studies have indicated that diabatic heating plays a crucial role in aligning the vortices of tropical cyclones (TCs) at various altitudes within a sheared environment. However, the influence of diabatic heating associated with convective asymmetries on the continuous tilt reduction, one pathway toward vortex alignment, remains insufficiently understood. In this study, idealized experiments under a full range of easterly moderate vertical wind shear (VWS) are conducted to investigate the continuous tilt reduction of the simulated TCs. The onset of TC intensification relies on achieving a vertically aligned TC structure while the evolution of the vortex tilt varies nonlinearly with shear magnitude. We demonstrate that the convective asymmetry, mainly enhanced on the downtilt side in the simulated TCs, plays a dominant role in the continuous tilt evolution. On the one hand, the direct influence of diabatic heating associated with the asymmetric convection facilitates the reduction of vortex tilt. On the other hand, the convective asymmetry generates a pair of counterrotating gyres over the inner-core region, with cyclonic (anticyclonic) vorticity located downstream of heating (cooling) regions. This convectively-induced asymmetric flow impedes vertical coupling of TC vortices. The evolution of the vertical tilt is primarily governed by the approximate balance between these two processes. This study highlights the critical importance of understanding convective evolution in TC intensification prediction.