It’s not actually weaker, per se. it’s just that it takes more force to distribute the vibration through a denser material with more mass. If you hit something with greater mass (more condensed molecules), the energy doesn’t reverberate/pass through it as strongly as something with less density. The increased mass dampens the vibration/energy. It’s just physics. No way to get around it.
Titanium will transfer the energy of haptics more because it is about half as dense as steel. Aluminum has even less mass and therefore transfers energy the most (I.e., the haptics are felt strongest).
