True. Hardening Sprints are a valuable practice for managing defects and ensuring smooth integration of software applications. These sprints are typically scheduled after the regular development sprints are completed and focus on tasks such as bug fixes, testing, and performance optimization. By dedicating a specific sprint for these activities, teams can ensure that issues are resolved and the software is ready for release. Additionally, Hardening Sprints can help improve collaboration between development, testing and operations teams and ensure that everyone is aligned on the final product.