Harry Bhadeshia is the Tata Steel Professor of Physical Metallurgy at the University of Cambridge, UK. His research is concerned with the theory of solid-state transformations in metals, particularly multicomponent steels, with the goal of creating novel alloys and processes with the minimum use of resources. He is the author or co-author of more than 600 research papers and 6 books. He is a Fellow of the Royal Society, Fellow of the Royal Academy of Engineering, the National Academy of Engineering (India), and the American Welding Society. In 2015 he was appointed a Knight Bachelor in the Queen’s 2015 Birthday Honours for services to Science and Technology.