Creo Simulate > Modeling Structure and Thermal Problems > Properties > Materials > Guidelines and Background > Material Basics
  
Material Basics
You can save materials in a library and use them across models.
You can use materials in the following ways:
• Create a new material.
• Assign a material to components, volume regions, idealizations and connections.
• Edit and delete existing materials.
• Copy the selected material.
• Save a material in a material library.
There is no limit to the number of materials you can have in a model or in your library.