<p>Dynamic globularization (DG) and dynamic phase transformation (DPT) are significant concurrent phenomena observed during thermal processing in lamellar Ti alloys. The experimental findings elucidate the occurrence of DG and DPT, as well as their underlying mechanisms, during hot deformation. The proportion of globularized α lamellae increases with higher deformation degrees, lower strain rates, or elevated deformation temperatures. Two distinct clusters associated with the lamellar and globular α phases are observed. The changing trend in Schmid factor, in conjunction with the inverse pole figure (IPF), indicates basal and prismatic glide mechanisms facilitating DG process. The DPT is featured by displacive nucleation and diffusion-controlled growth mechanisms. The transformed substructures in α and β phases provide rapid pathways for solute elemental diffusion, causing their sequential distribution from the β phase to α phase. This redistribution of elements, combined with stress concentration at phase boundaries, triggers the occurrence of DPT. As strain is applied, the accumulation of high-density dislocations progressively forms dislocation walls and low-angle grain boundaries, which subsequently evolve into grooves with the aid of the DPT. Ultimately, the infiltration of new β phases into the α plates results in their disintegration.</p> Graphical Abstract <p></p>