The present application relates to a method of joining a first component (1) to a second component, the method comprising preparing the first component (1) by forming an array of elongate projections (3) on a bond surface (2) of the component (1), each projection (3) having a centreline, a tip, and a base. The centreline at the tip of each projection (3) is oriented at an angle with respect to the normal to the bond surface (2) at its base, and the angular orientation of the tip centrelines varies across the array of projections (3). Next, the first component (1) and a flexible layer are brought together so as to embed the projections (3) in the flexible layer before hardening the flexible layer to form the second component. Also, a joint so formed.