RAMPTS 2023 is the 4th edition of the highly successful conference series RAMPTS. The theme of the conference is “Materials, Processes and Technologies for Sustainability”. Sustainable Engineering methods offer a new forum for a multi-disciplinary research areas connecting materials, methods and process for efficient utilisation of resources. Advances in technologies are critically dependent on materials innovation, which in turn relies on the ability to understand and control the optimized performance across an exhaustive set of metrices. The objective of this conference is to provide a place to share ideas, fundamentals, expertise, research and experience in the emerging areas of materials, process and technology for sustainability.