A method of joining two metal components for forming medical devices. The method includes placing a first and second metal component into a sleeve, the first sleeve composed of a nickel titanium alloy and having niobium deposited thereon, and heating the first sleeve so the niobium melts and reacts to form a joint joining the first and second components. A medical device is also provided having a first region having a first property, a second region having a second property different than the first property and a joint formed by a niobium coated nickel titanium alloy sleeve melted onto a first section of the first region and a second section of the second region.
