Abstract: A dental casting alloy based on Ni and Ti and having addition of cast of Mo, Fe, Cu and Co has the following composition in weight %:Ti: 40-50 % Mo 0.2-20 % Fe 0.1-1.5% Cu. 0.1-1.0% Co 0.1-0.

Abstract: A porous article of a nickel-titanium alloy, said article having a porosity of 8 to 90% and said porosity being defined by a network of interconnected passageways extending throughout said member, said network exhibiting a permeability of fluid material effective to permit complete migration of the fluid material throughout said network, said permeability being isotropic, and said member being elastically deformable; the porous article is useful as a biomedical implant and in other non-medical applications including the working element of cryogenic surgical instruments.