An axially swageable fitting for joining two or more tubes (112, 114), the fitting comprising: a sleeve having: an internal bore for receiving the two tubes to be joined; and an external surface having: an inner end, an outer end, an annular groove adjacent an inner surface, an annular lip adjacent said annular groove, a first surface extending from said annular lip to a point between said inner end and said outer end, a second surface extending from said first surface to said outer end; and a swaging ring having: an outer surface, an inner surface; wherein said inner surface of the swaging ring is adapted to form a mechanical interference fit with said sleeve when said swaging ring is swaged onto said sleeve, characterised in that the sleeve having a sleeve outer layer applied to said external surface of said sleeve and the swaging ring having a swaging ring inner layer applied to said inner surface of said swaging ring, one of said swaging ring inner layer and said sleeve outer layer are a hard metal and the other is a soft metal. a sleeve having: an internal bore for receiving the two tubes to be joined; and an external surface having: an inner end, an outer end, an annular groove adjacent an inner surface, an annular lip adjacent said annular groove, a first surface extending from said annular lip to a point between said inner end and said outer end, a second surface extending from said first surface to said outer end; and an internal bore for receiving the two tubes to be joined; and an external surface having: an inner end, an outer end, an annular groove adjacent an inner surface, an annular lip adjacent said annular groove, a first surface extending from said annular lip to a point between said inner end and said outer end, a second surface extending from said first surface to said outer end; and an inner end, an outer end, an annular groove adjacent an inner surface, an annular lip adjacent said annular groove, a first surface extending from said annular lip to a point between said inner end and said outer end, a second surface extending from said first surface to said outer end; a swaging ring having: an outer surface, an inner surface; wherein said inner surface of the swaging ring is adapted to form a mechanical interference fit with said sleeve when said swaging ring is swaged onto said sleeve, characterised in that the sleeve having a sleeve outer layer applied to said external surface of said sleeve and the swaging ring having a swaging ring inner layer applied to said inner surface of said swaging ring, one of said swaging ring inner layer and said sleeve outer layer are a hard metal and the other is a soft metal. an outer surface, an inner surface; wherein said inner surface of the swaging ring is adapted to form a mechanical interference fit with said sleeve when said swaging ring is swaged onto said sleeve, characterised in that the sleeve having a sleeve outer layer applied to said external surface of said sleeve and the swaging ring having a swaging ring inner layer applied to said inner surface of said swaging ring, one of said swaging ring inner layer and said sleeve outer layer are a hard metal and the other is a soft metal.