is illustrated by referring to fig1 at points a b and c this valley offers a range of composition for low temperature brazing applications which find special utility in joining together titanium metal surfaces compositions along the line between 57 ag 33 al 10 cu and 65 al 33 cu 2 ag will melt at temperatures below 1040 u00b0 f 560 u00b0 c the particular aluminum alloy compositions which have been evaluated and found to be effective in achieving high strength metallic bonds contain the following elements within the weight percentage ranges set forth in table i table i______________________________________ element percent______________________________________ copper 13 34 silver 0 41 lithium 0 0 1 aluminum balance______________________________________ as can be seen from table i the present invention contemplates the addition of small quantities of lithium to improve wetting and flow on titanium it was found that 0 01 weight percent lithium was adequate for improving the wetting and flow of these alloys on titanium additional quantities of lithium up to about 0 1 weight percent produced small improvements but at the expense of joint ductility examples 1 through 4 which follow disclose preferred alloy compositions within the ranges stated in table i and have the following approximate analysis ______________________________________ element percent______________________________________ aluminum 63 copper 32 silver 5 lithium 0 01______________________________________ ______________________________________ element percent______________________________________ aluminum 50 copper 25 silver 25 lithium 0 01______________________________________ the liquidus solidus relationship for the specific alloys of examples 1 2 3 and 4 are shown respectively in fig2 4 and 5 of the drawings the specific liquidus and solidus temperature for each alloy are shown in their respective drawings together with an indication of their compositional range unless otherwise indicated the.