Multi-component blending system

A blending system incorporating a blender with an operating cavity housing a plurality of elongate rod elements extending at least partially along the length of the operating cavity such that controlled relative movement between the rod elements and a multi-constituent composition within the operating cavity causes the development of predefined structures within the multi-constituent composition. The cavity within the blender incorporates a diminished cross-section in the vicinity of its terminal end. Methods to provide controlled development of microstructures and properties are also provided