Ducati XDIAVEL Owner's Manual page 75

When tackling long, high-gradient downhill road
tracts, shift down gears to use engine braking. Apply
one brake at a time and use brakes sparingly. Keeping
the brakes applied all the time would cause the
friction material to overheat as well as a possible
generation of vapour lock (brake fluid boiling) with a
considerable reduction of the braking power.
Underinflated and overinflated tyres reduce braking
efficiency, handling accuracy and stability in a bend.
74