This video shows how to use Autodesk Inventor to setup a two-part assembly for use in 3D printing with two materials. Although this video highlights Inventor, most CAD software follows a similar procedure.
For setting up a two-material print with MatterControl, follow this video link: • Two Material Print with MatterControl
For setting up a two-material print with Cura, follow this video link: • Two-Material Print with Cura
For the files used as demonstration in this video, follow this link: