With Erasmus program it’s possible to obtain a double degree (for example Engineering degree at Politecnico di Torino and same title at another university) by an agreed study plan between two universities.  
 
Outgoing students can have a maximum 18 months Erasmus scholarship. 
 
Politecnico di Torino established agreements with some European Universities such as: Grenoble INP, Ecole Supérieure d’Electricité (SUPELEC - Parigi, Rennes e Metz), TELECOM ParisTech-Paris, Ecole Nationale Supérieure de Mécanique et des Microtechniques de Besançon, Université de Technologie de Compiègne, Ecole Nationale d’Ingenieurs des Mines de Saint-Etienne, Institut Superieur de l'Aeronautique et de l'Espace a Toulouse in FRANCE, Technische Universität Darmstadt in GERMANY, Universitat Politècnica de Catalunya Barcelona, Universidad Politécnica de Madrid in SPAGNA, KTH di Stoccolma in SWEDEN,  Cranfield University in UK, Université Catholique de Louvain in BELGIUM.
 
Recently some agreements have been issued with extra-European universities. 
 
These agreements involve a period from one to two years to spend at the foreign University. Usually it’s one academic year abrod plus a semester for the final project writing; that couses to have a longer studies duration lasting one semester more. Anyway, students can beneficiate of a maximum 18 months Erasmus scholarship.