Metamaterials have extraordinary properties due to their designed structure rather than their
constituent materials. Increasingly, metamaterials are formed that demonstrate reprogrammable
properties; here, a property can be altered using a conditional input, separate from the deformation
input, to access the property. To achieve materialised control for the reprogramming of
properties and to subsequently simplify the use of a metamaterial, we harnessed mechanical instabilities, firstly, to memorise deformation history, and secondly, to dictate deformation output.
Metamaterials based on our unit-cell can adapt to deformation input and process this information
without requiring active control. This paper presents a tunable design of a metamaterial
unit-cell with dual-property deformation behaviour for which an axial strain is used as the input
to access its output deformation, as well as the input to switch between modes. Characteristics
of the mechanism are analysed using simulations and are validated with experiments. Applications
exploiting features of the unit-cell are explored in reprogrammable material properties and
materialised computation.