The kagomé metals RbTi₃Bi₅ and CsTi₃Bi₅

The kagom\'e metals RbTi$_3$Bi$_5$ and CsTi$_3$Bi$_5$ were synthesized both as polycrystalline powders by heating the elements an argon atmosphere single crystals grown using a self-flux method. compounds crystallize in hexagonal crystal system isotypically to KV$_3$Sb$_5$ (P6/mmm, Z = 1, CsTi3Bi5: 5.7873(1) {\AA}, c 9.2062(1) {\AA}; RbTi3Bi5: 5.773(1) 9.065(1) {\AA}). Titanium atoms form net with bismuth hexagons well above below triangles. alkali metal are coordinated 12 AlB$_2$-like slabs between layers. Magnetic susceptibility measurements reveal Pauli-paramagnetism traces of superconductivity caused CsBi$_2$/RbBi$_2$ impurities. Magnetotransport conventional Fermi liquid behavior quantum oscillations indicative dominant orbit at low temperature. DFT calculations show characteristic metallic band structure similar that CsV$_3$Sb$_5$ reduced filling. A symmetry analysis does not obvious unique signature nontrivial topology.