> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ntop.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Can I run a Topology Optimization with an Orthotropic material?

## Question:

Can I run a Topology Optimization with an Orthotropic material?

## Applies to:

* Topology Optimization

## Answer:

No, we support orthotropic material models, but we don't support optimizing the materials frame locally. If you permute the material properties, the Top Opt will result in an error regarding improper elastic properties.

## Keywords:

*topology question optimization material orthotropic opt top anisotropic*