The objective of this study is to compare the resultant surface of nitinol (Ni-50.8 at%Ti) post heat treatment using different methods. Wire samples were exposed to 500ºC for common processing times in a fluidized bed or a salt bath. Optical microscopy and scanning electron microscopy confirmed the surface appearance, colors and oxide thickness of each method. The thickness increases with treatment time and with use of a fluidized bed over a salt bath.