The dissimilar material joining of aluminum and titanium alloys is recognized as a challenge due to the significant differences in the physical, chemical, and metallurgical properties of these alloys, where the increasing demands for high strength and lightweight alloys in aerospace, defense, and automotive industries. Joining these two alloys using the conventional fusion techniques produces commercially unacceptable sound joints due to irregular, complex weld pool shapes, cracking and low strength, high residual stresses, cracks, and microporosity, and the brittle intermetallic compounds formation leads to poor formability or inferior mechanical properties. The formation of intermetallic compounds is inevitable but it is less severe in solid-state than in the fusion welding process. Hence, this article reviews on aluminum–titanium joining using different solid-state and hybrid joining processes with emphasis on the effect of process parameters of the different processes on the weld microstructure, mechanical properties along with the type of intermetallic compounds and defects formed at the weld interface. Among the various solid-state welding processes for aluminum–titanium joining, the following grades of aluminum and titanium alloys were employed such as cp Ti, Ti6Al4V, cp Al, AA1xxx, AA 2xxx, AA5xxx, AA6xxx, AA7xxx, out of which Ti6Al4V and AA6xxx alloys are the most common combination.

铝和钛合金的异种材料连接被认为是一个挑战，因为这些合金的物理，化学和冶金性能存在显着差异，在航空，国防和汽车行业对高强度和轻质合金的需求不断增加。由于不规则，复杂的熔池形状，裂纹和低强度，高残留应力，裂纹和微孔，使用传统的熔合技术将这两种合金接合在一起会产生商业上不可接受的健全接头，而脆性的金属间化合物形成会导致可成形性差或机械性能差特性。金属间化合物的形成是不可避免的，但固态状态下的熔合强度不如熔焊工艺中的严重。因此，本文介绍了使用不同的固态和混合连接工艺进行的铝-钛连接，重点介绍了不同工艺的工艺参数对焊缝组织，力学性能以及金属间化合物的类型和在焊缝处形成的缺陷的影响。在铝-钛连接的各种固态焊接工艺中，使用了以下等级的铝和钛合金，例如cp Ti，Ti6Al4V，cp Al，AA1xxx，AA 2xxx，AA5xxx，AA6xxx，AA7xxx，其中Ti6Al4V和AA6xxx合金是最常见的组合。机械性能以及金属间化合物的类型以及在焊接界面处形成的缺陷。在铝-钛连接的各种固态焊接工艺中，使用了以下等级的铝和钛合金，例如cp Ti，Ti6Al4V，cp Al，AA1xxx，AA 2xxx，AA5xxx，AA6xxx，AA7xxx，其中Ti6Al4V和AA6xxx合金是最常见的组合。机械性能以及金属间化合物的类型和在焊接界面处形成的缺陷。在铝-钛连接的各种固态焊接工艺中，使用了以下等级的铝和钛合金，例如cp Ti，Ti6Al4V，cp Al，AA1xxx，AA 2xxx，AA5xxx，AA6xxx，AA7xxx，其中Ti6Al4V和AA6xxx合金是最常见的组合。