The present report summarizes and highlights the main results of the work carried out during the last 5-6 years on effects of neutron irradiation on physical and mechanical properties of copper and copper alloys. The work was an European contribution toITER Research and Development programme and was carried out by the Associations Euratom - Risø and Euratom - Tekes. Details of the investigations carried out within the framework of the present task and the main results have been reported in variousreports and journal publications. On the basis of these results some conclusions are drawn regarding the suitability of a copper alloy for its use in the first wall and divertor components of ITER. It is pointed out that the present work has managed onlyto identify some of the critical problems and limitations of the copper alloys for their employment in the hostile environment of 14 MeV neutrons. A considerable amount of further effort is needed to find a realistic and optimum solution.