The Bell Helicopter V-22 Guidebook covers survivability in Appendix 1.
Specifically it refers to
Redundant Fly-by-Wire Controls
Redundant Electrical Power
Redundant Hydraulics Swashplate
implying that this possibility has been engineered to a minimum.
Nevertheless, the premise of your question is that it's occurred, so further on in the same section we see
V-22 crashworthiness is a function of design. Heavy components, such
as the engines and transmissions, are located away from the cabin and
cockpit area. The proprotors are designed to fray or “broomstraw”
rather than splinter on impact with the ground. The energy-absorbing
landing gear system is designed to attenuate most of the energy for
hard landings up to 24 fps. The wing is constructed to fail outboard
of the wing/fuselage attachment in a manner that absorbs kinetic
energy and ensures the cabin area will not be crushed, thereby
protecting the occupants. An anti-plow bulkhead prevents the nose
from digging in on impact, and the fuselage provides a reinforced
shell that is designed to maintain 85% of its volume during a crash.
Aircrew and embarked troops receive additional protection from
crashworthy seats that stroke vertically to absorb energy
Since the aircraft is still flying, I'd head for the nearest decently equipped airfield, conduct a normal fixed wing approach and land, trusting that the rotors will sweep a nice clean path along the runway instead of peppering the fuselage with shrapnel. I'd probably take the precaution of cutting power early to reduce the kinetic energy in the rotors before they hit the ground.