A　hot-processing　map　and　TEM　images　of　a　1235　aluminum　alloy　have　been　used　while　studying　hot-deformation　characteristics　of　this　alloy.　The　results　showed　that　an　ideal　processing　region　exists　in　the　high-temperature/low-strain-ratearea　and　that　the　power-dissipation　efficiency　is　around　46　%.　It　is　better　to　avoid　deformations　at　the　low-temperature/high-strain　rate　and　the　high-temperature/moderate-strain　rate　due　to　their　processing　instability　and　lower　power-dissipation　efficiency.