This video shows how to use MatterControl to setup a 3D print utilizing two different materials for different portions of the part.
For setting up a two-material print with Cura, follow this video link: • Two-Material Print with Cura
For Preparing an assembly in CAD to export as a two-material print, follow this link: • Preparing an Assembly for 3D Printing with...
For the files used as demonstration in this video, follow this link: