I agree that Industrial Designer is a good and more specific term for what we do (at least to people in the realm of physical product design), but I personally chose the title of “Senior Product Designer” (with my boss’s blessing, of course) because I do spend a considerable portion of my time on tasks usually associated with Mechanical Engineers / Design Engineers. So in my case I am embracing the broadness and ambiguity of the title Product Designer, but for most traditional ID roles I would expect Industrial Designer to be on the job posting.