56 LISI - 2025 Integrated Report INNOVATION PROCESS CUTTING BUY-TO-FLY: THE TYX CHALLENGE Initially deployed in series production for titanium structural components (flanges, joining fittings), TYX technology (see box below) is now being extended to aluminum parts. Prototypes of three aluminum part numbers were delivered in 2025, and early customer feedback confirms the relevance of the approach: machining and assembly trials demonstrate highly repeatable geometry. “These tests have shown equivalence, and in some cases improved performance versus forged parts in terms of dimensional conformity,” notes Elisabeth Willocq, R&T Director – Engine and Structural Components, LISI AEROSPACE. Current work is focused on fully demonstrating process repeatability and robustness in preparation for qualification and certification phases. Compared with conventional methods, the TYX process enables lower material consumption and therefore reduces the buy-to-fly ratio. Matthieu Minvielle, Industrial Director, LISI AEROSPACE Marmande Beyssac. In December 2025, a TRL5* maturity milestone (validation in a representative environment) was achieved with a customer on aluminum parts. The objective is to reach TRL6 (demonstration on an industrial pilot line) in the third quarter of 2026, a prerequisite for the launch of industrialization of an initial part number targeted for entry into service at the end of 2027. A first contract for series parts designed with this technology has been secured, marking the dawn of industrial deployment. “This new approach enables lower material consumption than conventional processes — and therefore a reduced buy-to-fly ratio — as well as improved machinability,” notes Mathieu Minvielle, Industrial Director, LISI AEROSPACE Marmande Beyssac. Beyond material performance, TYX technology also opens up new design possibilities, enabling geometries that are difficult to achieve with conventional processes. * TRL – Technology Readiness Level: a measurement system used to assess the maturity of a technology. Used in series production for complex titanium parts, the TYX technology is reaching new milestones. First flight applications are expected by 2027.
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