. One of the key factors which determines the crystallization behaviour of fat is the TAG-composition. Even small changes in the TAG-composition can have an impact on the crystalli-zation and thus final properties of fat. Natural oils and fats consist of a broad range of TAGs making it difficult to understand and model the crystallization behaviour. Each TAG has its own polymorphic and melting behaviour and this together with specific interaction within a mixture of TAGs makes the phase behaviour of TAG mixtures complex