The Joint Research Centre's Institute for Advanced Materials, Petten, has published its Annual Report on activities undertaken in 1993. The report highlights the Institute's scientific and technical achievements in the following areas of activity: - Advanced materials (materials for extreme environments, reliability and life extension, measurement and validation methodologies, surface modification technology, materials information and data management); - Controlled thermonuclear fusion (fusion materials); - Supplementary programme on the operation of the high flux reactor (this report is published in condensed form); - Scientific and technical support to the services of the European Commission; - Exploratory research. The first two areas cover the JRC's contribution to the specific RTD programme on advanced materials (BRITE/EURAM) and the specific RTD programme on controlled thermonuclear fusion. Projects within each programme are described individually. A list of JRC publications is included, as well as information on the meetings and conferences which took place during 1993, a glossary of terms, and a list of authors.