Microstructure of Ti–6Al–4V after (a–b) SLM fabrication, (c–d) SLM fabrication followed by heat treatment at 750 °C for 2 h, (e–f) SLM fabrication followed by heat treatment at 1020 °C for 2 h, (g–h) WAAM fabrication, and (i–j) traditional rolling (Reproduced with permission from Ref. [46]. Copyright 2018 by Elsevier.)