Asitang Lahurikar
Ansys Employee

Hi,

When modeling a composite RVE with more than one particle, a User-Defined model type needs to be used. To learn how to model a User-Defined RVE, please refer to the knowledge material - Ansys Material Designer - User Defined RVEs (Representative Volume Elements) - Ansys Knowledge

Additionally, please see if this Forum discussion is useful - How to combine two materials and create a new material in Ansys Workbench.

Hope this helps!
Regards,
Asitang