The bezel and body are resin plastic. Band links are solid titanium. Be careful because this specific model pathfinder (prg240T) seem to have a lot of fakes going around. The fakes are noted as suffering from the exact design symptoms you quoted in your review: loose compass bezel ring, cheaply plated bracelet instead of solid titanium and pins instead of screws. Also the fakes use regular cheap plastic instead of resin plastic. The resin plastic would feel like metal when you flick your finger against it and not plastic.
If you did get a fake then I am also willing to bet your Adjust button is loose and your Baro button is hard to press while the Compass and Alti buttons are loose.
There are a few videos on youtube and lots of info at the watch forums about the fake prg240s.