This volume features 24 carefully selected papers from the ninth International and 30th All India Manufacturing Technology, Design, and Research (AIMTDR) Conference, held during December 8-10, 2023, at the Indian Institute of Technology (BHU). The contributions included in this collection reflect the current focus areas and pressing challenges faced by manufacturing engineers and researchers. A significant number of these papers explore aspects of surface engineering, delving into both innovative processing techniques and the resultant quality of finished products. The book also features latest research on metal forming technologies, such as incremental sheet forming, showcasing advancements pushing manufacturing capabilities' boundaries. Additionally, it includes papers that underscore the growing importance of modeling and simulation, employing numerical methods like the Finite Element Method (FEM) to enhance efficiency and accuracy in design and production. The book can be a valuable reference for researchers and professionals interested in material processing techniques.