The Laboratory of Physical and Chemical Studies of Materials (LEPCM) and the Faculty of Matter Science of Batna 1 University organize the 7th International conference on the world of technology and advanced materials (WITAM2025) in Batna (Algeria) on 4 and 5 November 2025 TOPICS a) Thermodynamic calculations using CALPHAD. b) Ab-initio calculations of Physical properties. c) Materials characterization d) Alloys based on noble metals. e) Advanced Nanomaterials. f) Biomechanics and Biomaterials g) Material recycling and environmental assessment h) Ceramics, Glasses and composite materials