Indium and bismuth, although distinct in several properties and areas of application, have relatively low melting temperatures and some common areas of application. This Article discusses two significant uses of indium and bismuth alloys, namely, in low-melting-temperature solders and in fusible alloys. It provides a brief note on the occurrence, recovery and production processes, and several other areas of application. Tables provide helpful information on the designation, classification, composition, properties, suitability, and temperatures ranges of these alloys.