Method for obtaining a product made of titanium alloy or a titanium-aluminium intermetallic compound

A method for obtaining a product made of a titanium alloy or a TiAl intermetallic compound by plasma torch melting, the alloy having an oriented structure, the method comprising:

• heating, with a plasma torch, a molten alloy surface at a casting ring;
• cooling a cold area at the casting ring below the molten alloy surface, over a length L1 at a temperature comprised between 0 and 50° C., thereby forming a semi-solid alloy crown;
• heating, downstream of the cold area, a hot area over a length L2 at a temperature between Tf×0.8 and Tf×1.25, Tf representing the melting temperature of the considered alloy, thereby enabling control of an alloy solidification front at the outlet of the hot area, the alloy solidification front having a flatness with respect to a plane perpendicular to a drawing direction of less than 10°;
• and
• drawing the solidified alloy at a speed higher than 10−4 m/s along the drawing direction.