You may choose from standard Ansys predefined materials or you may customize your own material. Upon selecting a material from the drop-down selection, the properties of Elastic Modulus (in GPa), Poisson Ratio, and Yield Strength (in MPa) for that material automatically populate the fields on the form. These values are for materials at room temperature. To see the other properties associated with a given material, or to customize a material, you will need to bring up the Materials Library. See Customizing a Material.