A　feasible　manufacturing　&　forming　integration　technology　for　production　of　TiB-TiAl　composite　sheets　was　successfully　explored　by　employing　reaction　annealing　of　sandwich-structured　(TiB/Ti)–Al　laminates.　Phase　transformation,　microstructure　evolution　of　(TiB/Ti)–Al　laminates　during　different　reaction　annealing　processes　were　systematically　investigated　by　means　of　optical　microscope,　scanning　electron　microscopy,　transmission　electron　microscope　and　X-ray　diffraction.　The　results　showed　that　the　resulting　TiB-TiAl　composites　displayed　a　unique　micro-laminated　structure,　composing　of　alternating　fully　lamellar　(α2-Ti3Al/γ-TiAl)　layers,　equiaxed　γ-TiAl　layers　and　TiB-rich　layers.　Actually,　TiB　whiskers　exhibited　a　layered　distribution　in　fully　lamellar　α2/γ　layers,　which　was　in　favor　of　α2/γ　lamellae　refinement.　Moreover,　formation　mechanism　of　the　micro-laminated　structure　was　illustrated.　It　is　noteworthy　that　the　micro-laminated　TiB-TiAl　composites　showed　a　significant　increase　in　ductility　while　maintaining　or　even　improving　high-temperature　tensile　strength,　in　comparison　with　monolithic　TiAl.　In　addition,　fracture　behavior　of　the　novel　TiB-TiAl　composites　was　characterized　by　three-dimensional　X-ray　microscope　(3D-XRM)　and　finally　strengthening-toughening　mechanism　were　clarified.　©　2018　Elsevier　B.V.