Definitions for "Transition Temperature"
An arbitrarily defined temperature lying within the temperature range in which the fracture of notched steel impact.
Temperature, at which in the notched bar impact test the transition from a ductile to a brittle fracture indicates. Above the transition temperature brittle fractures are not to be expected, below cleavage fractures have to be reckoned with.
The temperature at which a polymer changes from (or to) a viscous or rubbery condition (or from) a hard and relatively brittle one.