Well, the predecessor is stainless steel, which I imagine is closer to the Ti number, and in my experience with 12/13 Pro it's always the back that throws off h

Well, the predecessor is stainless steel, which I imagine is closer to the Ti number, and in my experience with 12/13 Pro it's always the back that throws off heat, not the frame. Anyhow, just the frame is this material, inside its Al.