This book includes the selected extended peer-reviewed papers abstracts of which were presented at the 12th International Conference: Innovative Technology for Joining Advanced Materials (TIMA21) held in Timișoara, Romania, by videoconference, during November 25-26, 2021. Particular attention was given to practical problems in the area of new joining technologies, mechanical and structural characterization of advanced materials and joints, corrosion and assessment of damage state.