  Data for inelastic processes due to hydrogen atom collisions with manganese
and titanium are needed for accurate modeling of the corresponding spectra in
late-type stars. In this work excitation and charge transfer in low-energy Mn+H
and Ti+H collisions have been studied theoretically using a method based on an
asymptotic two-electron linear combination of an atomic orbitals model of
ionic-covalent interactions in the neutral atom-hydrogen-atom system, together
with the multichannel Landau-Zener model to treat the dynamics. Extensive
calculations of charge transfer (mutual neutralization, ion-pair production),
excitation and de-excitation processes in the two collisional systems are
carried out for all transitions between covalent states dissociating to
energies below the first ionic limit and the dominating ionic states. Rate
coefficients are determined for temperatures in the range 1000 - 20 000 K in
steps of 1000 K. Like for earlier studies of other atomic species, charge
transfer processes are found to lead to much larger rate coefficients than
excitation processes.
