Earlier quoted context omitted.
A Pentium chip would probably seem like an incomprehensible material to Alan Turing (and not just because of the awful instruction set), because even though all the materials were known at the time, the design and fabrication techniques and mind-bogglingly fine granularity and complexity of how they are combined hadn't been conceived of yet. I agree the reporters probably flubbed the word "alloy" for lack of a better…
You think Alan Turing wouldn't be able to use a microscope?
Edit: And even when he died in the 1954, electron microscopes werent that advanced... we still needed to invent new techniques, improve our lens manufacturing, etc. There were a lot of shortcomings with it back then that limited its usage. So even in his later years, I wonder how much detail he could actually see on a modern CPU.