Combustion of titanium plates

The lower combustion limit is determined depending on the pressure of plates made of OT-4 titanium alloy in an O$_2$–Ar medium. The values of this limit decrease monotonically as the concentration of oxygen in O$_2$–Ar mixtures grows and increase with the sample thickness. The velocity of combustion propagation over the surface of the samples in a 75% O$_2$+25% Ar mixture at a pressure of $\le$ 3.1 MPa is found. It is shown that, for titanium, the dependence of the combustion rate on the sample thickness is much weaker and, in contrast, it is much stronger on the pressure compared to similar dependences for cylindrical soft-steel samples known from the literature.