IRTC is an internationalization project funded by EIT Raw Materials. It discusses different approaches towards assessing materials criticality and takes place in the form of half-day workshops at established international conferences. Results will be published in the form of three joint scientific papers and a Roadmap on Criticality for authorities. The project shall advance the research in criticality assessment, foster international exchange and education in the topic, identify common ground and differences, and raise awareness towards materials criticality, especially in industry. It shall also lay the cornerstone for a long-lasting international network.