Castastrophic failure of Liberty Ships and T-2 tankers during Word War II and many ships' failures thereafter instigated extensive research into the problem of brittle fracture. Later, the failure of missiles and aircraft gave a new boost to fracture research in the late 50's and 60's. New concepts of fatigue analysis and fracture are being continuously established and refined.

This proceedings gather a selection of peer-reviewed papers presented at the 9th International Conference on Fracture Fatigue and Wear (FFW 2021), held in the city of Ghent, Belgium on 2–3 August 2021. The contributions, prepared by international scientists and engineers, cover the latest advances in and innovative applications of fracture mechanics, fatigue of materials, tribology, and wear of materials. In addition, they discuss industrial applications and cover theoretical and analytical methods, numerical simulations and experimental techniques. The book is intended for academics, including graduate students and researchers, as well as industrial practitioners working in the areas of fracture fatigue and wear.