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The crystallite orientation distribution function has been determined for cold-rolled copper, copper-10 per cent zinc and copper-30 per cent zinc (-brass) at cold reductions of 0, 20, 40, 60, 80, 90 and 95 per cent. The copper texture exhibits a steady development and contains a tube of orientations between limits which have previously been shown to be stable during multiple slip processes ({110}(112) to-{44 11}(11 11 8)). The textures of the copper-zinc alloys both show a similar initial development to that of copper but a transition occurs above a reduction of about 40 per cent. This indicated that an additional deformation mode had become active. The features of the transition are consistent with those expected if the additional deformation mode were mechanical twinning. The development of the basic texture (pure-metal type) is in agreement with predictions based on the assumption of multiple slip conditions incorporating a considerable amount of cross-slip.

Discrete methods of orientation distribution (ODF) analysis are applied to quartz and calcite rocks with trigonol crystal and triclinic sample symmetry. ODF’s are calculated from pole figures measured by neutron diffraction. A particular complication for quartz is the presence of overlapping peaks which can be separated with the WIMV or ADC algorithms based on diffraction intensity differences. Both methods provide similar solutions. Characteristic differences are discussed. By comparing ODF’s obtained from different data subsets (changing number and extent of pole figures) it is concluded that quantity and quality of data, as well as the texture type, have a crucial influence on resolution. It is demonstrated that discrete methods provide the possibility to obtain quantitative texture information from minimal experimental data.