A new heat treatment is discussed wherein Differential Thermocouple Analysis (DTA)  is used to give real time feedback of the phase transformations. This results in extraordinary control of the heat treat process.  Real world applications are identified The process can be integrated very well with Differential Heat treatment.  This process can be used to create mechanical properties that are variable and tailored to end use. For example; high strength in one location and high fatigue resistance in another location. The process can also lead to a new form of thermo-mechanical heat treatment, where first differential heat treatment is done to create variable properties and then laser peening is done to create dislocations which are trapped by subsequent heat treatment.  This results in extraordinary fatigue resistance in the core section, while ensuring high strength in the outer surface. This technology results in capabilities that do not exist today in industrial heat treating.