[en] The techniques for texture determination using neutron diffraction developed at Risoe have been applied to a study of the change in texture associated with grain growth in 99.999 wt.% pure wt.% pure copper rods. While these techniques would appear to allow a quasi-dynamic study to be made relatively easily extinction losses can be a problem, particularly when grain growth is not normal as is the case for the system examined. In the present study extinction corrections were made by a normalisation procedure where dynamic curves measured for a stable tecture component were used as reference. The corrected results for the copper examined indicate that the <111> fibre texture present after recrystallisation strengthens during grain growth, with an activation energy for the rate controlling process of 110 kJ mol^-1. (author)