Not every material is ideal for every manufacturing process
A material might be easily machined, but impossible to 3D-Print
With Generative Design, the material density is used to calculate the outcome mass when you apply a gravity load and/or frequency constraints. The material density must be different from zero for gravity to affect the outcome.
The Yield Strength value of the material is used to calculate the Safety Factor.
The Poisson’s ratio and Young’s Modulus of the material are the main values used to solve the linear stress problems when generating outcomes.