> For the complete documentation index, see [llms.txt](https://delta-robotics.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://delta-robotics.gitbook.io/docs/learn.md).

# Learn

The Nitinol knowledge behind Delta's artificial muscles, from materials science to hands-on training

Delta's artificial muscles are built on Nitinol, a shape memory alloy that contracts when heated and relaxes as it cools. This section collects the materials knowledge behind those muscles: what Nitinol is, how its phases work, how to train (shape-set) it yourself, and where to read further.

Start with the fundamentals, learn to train your own wire, then dig into the source material.

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>What is Nitinol?</strong></td><td>The shape memory alloy behind Delta's muscles: phases, transitions, and material properties.</td><td><a href="/docs/learn/nitinol-faq.md">What is Nitinol?</a></td></tr><tr><td><strong>How to Train Nitinol</strong></td><td>Shape-set your own wire, with methods for hobbyists, engineers, and ThermoFlex users.</td><td><a href="/docs/learn/how-to-train-nitinol.md">How to Train Nitinol</a></td></tr><tr><td><strong>Further Research</strong></td><td>Curated papers, guides, and data sheets for going deeper on Nitinol.</td><td><a href="/docs/learn/further-research.md">Further Research</a></td></tr></tbody></table>