Yeah, I've still rarely seen honest discussions about what damping means in terms of structural materials. If you made a bell out of cast iron instead of bronz

Yeah, I've still rarely seen honest discussions about what damping means in terms of structural materials. If you made a bell out of cast iron instead of bronze, it would still ring, but it would ring for a shorter duration. This is because cast iron has higher internal damping than bronze. It is a viscoelastic effect, in that energy lost is proportional to the speed of movement (strain rate) within the material. I imagine that most of the discussions about bike frame damping are not focused on this viscoelastic damping effect, but are more focused on the dynamic shock absorption effects that are a consequence of the mass and stiffness differences embodied in different frames. When you change frame material, you change so many other variables (tube wall thickness, etc) of the frame that a real apples-to-apples comparison is weird.