Bumpers are ideally deformable, but re-formable. They should bounce back. Body panels are judged by tight seams, a deformable part will not have tight seams, Saturn used plastic body panels but was blasted for poor fit and finish. Design News - Blog - Finally We Get Some Truth on Plastic Body Panels http://www.i-car.com/pdf/advantage/online/2007/100107.pdf
the front bumper is also aluminium under all the foam and plastic. They replaced mine after the dog/car incident as it was bent.
Hood, hatch, brake calipers and I think a few suspension bits are aluminium. The rest are steel (except the bumpers which are plastic) AFAIK. All aluminium is too expensive (see NSX, XJ and 1G Insight). All plastic = panel gap issues, aerodynamics, wind noise (plastics expand/contract much more than steel. See Saturn or smart fortwo and look at the size of the gaps between exterior panels).
Cool thanks my bad Japan, Thailand and mainland China still not in Taiwan. Some more pics, http://www.carnewschina.com/2012/01/16/first-pics-china-made-toyota-prius-to-be-listed-in-february/ Posted from my iPhone via the Tapatalk app.
wait... i thought it was the doors, hood, roof, and rear hatch. the actual body panels that connect to the rocker panel are not aluminum. and of course as everyone said, the bumpers are plastic. i didn't think about the suspension parts... as for repairing aluminum... i thought you can but it requires heat and a lot of pressure?.?.?... (not 100% fixed but enough after it's repainted. mainly smaller dents)
You can, but aluminum work hardens. Pounding out a dent will create stress lines that will ultimately crack. Tom
I think they changed the doors to steel for 2010. They sound different from the aluminium doors of the Gen 5 Camry.