This paper presents a novel multi-directional blending method for heterogeneous object modeling. Contrary to earlier studies, this research introduces material blending through multiple features with different heterogeneous material composition. This research could have the potential to enrich the theoretical system of complex-shaped heterogeneous objects and advance the systematic approaches in heterogeneous object design with irregular heterogeneities. Feature-based method is used to represent and design heterogeneous objects with multi-directional material composition. Multi-directional material composition is mapped onto ruled surface based geometric domain based on a set of relations such as neighborhood relations and material presence relations in addition to one to one correspondence of geometric variation driven material composition variation. The proposed methodologies are implemented and illustrative examples are given in this paper.