Hybrid fastening system and associated method of fastening

A method for preparing a titanium-alloy material hybrid fastening system, comprising the steps of:

• forming a titanium or titanium-alloy material threaded pin component, and forming a mating titanium or titanium-alloy material swage collar component, wherein at least one of the threaded pin component and the swage collar component is formed of an ultra-fine grain titanium material or an ultra-fine grain titanium-alloy material;
• applying a corrosion-resistant, curable organic coating material to a titanium or titanium-alloy material threaded pin component and to a titanium or titanium-alloy material swage collar component having internal dimensions approximating the dimension of and conformable to the threads of the threaded pin component wherein the coating material comprising a phenolic resin and an organic solvent;
• curing the coating material after application to the threaded pin and swage collar components, wherein the threaded pin component and the swage collar component are not fully heat-treated prior to coating and are subsequently heat-treated concurrently with the curing of the coating material;
• and
• fastening a first component to a second component following curing of the organic coatings by installing the threaded pin component through the components and installing the swage collar component to the threads of the threaded pin component, wherein the step of fastening includes the step of completing the fastening without using any wet sealant between the threaded pin component, swage collar component, and the structural components.