[en] A review of the effects of DT neutron damage in fusion reactor structural components and magnets is given. It is shown that the displacement rates in fusion systems are about equal to or less than those of present-day fission reactor facilities but gas production rates are one to two orders of magnitude higher. The effect of neutrons on mechanical properties such as yield strength, ductility, and creep is briefly reviewed and it is noted that very little, if any, direct data exist for 14-MeV-neutron-irradiated metals. Resistivity increases in magnet-stabilizing metals and the reduction in critical properties of superconductors is shown to be minimal and subject to reduction by several design options. The level and decay of induced radioactivity is explored for various metals and levels of >=1 Ci per thermal watt are easily achieved at shutdown. The decay of afterheat, from shutdown values of 0.5 to 1% of the operating power, is shown to be a function of materials choice and V and A1 appear to offer some distinct advantages. Finally, a possible method of solving radiation damage problems is discussed. (author)