1. Introduction, definitions, classification and mineralogical examples, by Bernard Capelle (IMPMC, Paris)

2. Twins in chemical crystallography point of view ; Flack parameter and chirality, by Regine Herbst-Irmer (Univ. Goettingen)

4.Group Theory and coset decomposition, by Pierre-Emmanuel Petit (IMN, Nantes)

5. Twins in metallurgy:

• 5.1 Alliages à mémoire de forme ..., by Philippe Vermaut (ENSCP Paris)
• 5.2 TRIP and TWIP Ti alloys, by Philippe Vermaut (ENSCP Paris)
• 5.3 Z module approach, by Richard Portier (ENSCP Paris)

7. Multigrains crystallography, by Jon Wright (ESRF, Grenoble)

8. Tools for twins and Eval15 software, by Martin Lutz (Univ. Utrecht)