This web site has a fatal limitation as a historical document - only one derailleur (the Tiso Altore 366) is pictured. However it describes a range of 4 derailleurs:
All the derailleurs are CNC machined from 7075T6 - a high strength aluminium alloy with good fatigue resistance - and use Ti-6Al-4V titanium pivots. Classy stuff - but then Tiso indulges in ‘search and developpment’ and ‘boats the experience in design and realisation of special components for bycicle’. They are, clearly, so focussed on their engineering that there is no single neuron left to attend to that pesky proofreading.
The graphic style is also a touch bizarre - Robocop meets Ironman in a blizzard of distracting shapes.