On the ribbon, click Assemble tabManage panelBill of Materials.
Right-click on a column, and select Runtime Column Customization.
In the Customization dialog box, drag and drop Material onto a column.
Click in the desired cell, and enter a Material name.
Note: The availability of a Material is based on component type. If the selection contains a mix of parts (for example, assemblies and weldments), the change is only applied to the component type of the edited cell.
To assign a material to a Virtual Component:
Click Tools tabOptions panelDocument Settings Standard tab.
Change the default material for a virtual component.