1. Introduction.- 2. Corrosion.- 3. Stress Corrosion Cracking (SCC).- 4. Environmental severities: natural/outdoor versus accelerated testing.- 5. Aluminium-lithium alloys: some corrosion and SCC issues.- 6. Stainless steels: some corrosion and SCC issues.- 7. Titanium alloys: special issues and aspects concerned with SCC testing.- 8. Summary.- Acknowledgements.- References.