Process for producing an article in an additive manufacturing method with layers of different materials, comprising the steps of: I) providing a build material heated at least partly to a temperature above its glass transition temperature on a carrier, such that a layer of the build material is obtained, corresponding to a first selected cross section of the article; II) providing a build material heated at least partly to a temperature above its glass transition temperature on a previously provided layer of the build material, such that a further layer of the build material is obtained, corresponding to a further selected cross section of the article and bonded to the previously provided layer; III) repeating step II) until the article is formed; wherein, in steps I) and II), the providing of a build material heated at least partly to a temperature above its glass transition temperature is effected by applying a filament of a build material heated at least partly to a temperature above its glass transition temperature, wherein the build material in each of the individual steps II) is selected from a first build material containing a thermoplastic polyurethane polymer or a second build material different therefrom that contains a thermoplastic polyurethane polymer, wherein step II) is conducted at least once with the first build material and step II) is conducted at least once with the second build material, wherein the first and second build material differ from one another by their Shore hardness to DIN ISO 7619-1 and wherein the difference in Shore hardnesses to DIN ISO 7619-1 between the first and second build material is ≥ 5A to ≤ 55A and/or ≥ 5D to ≤ 40D. I) providing a build material heated at least partly to a temperature above its glass transition temperature on a carrier, such that a layer of the build material is obtained, corresponding to a first selected cross section of the article; II) providing a build material heated at least partly to a temperature above its glass transition temperature on a previously provided layer of the build material, such that a further layer of the build material is obtained, corresponding to a further selected cross section of the article and bonded to the previously provided layer; III) repeating step II) until the article is formed; wherein, in steps I) and II), the providing of a build material heated at least partly to a temperature above its glass transition temperature is effected by applying a filament of a build material heated at least partly to a temperature above its glass transition temperature, wherein the build material in each of the individual steps II) is selected from a first build material containing a thermoplastic polyurethane polymer or a second build material different therefrom that contains a thermoplastic polyurethane polymer, wherein step II) is conducted at least once with the first build material and step II) is conducted at least once with the second build material, wherein the first and second build material differ from one another by their Shore hardness to DIN ISO 7619-1 and wherein the difference in Shore hardnesses to DIN ISO 7619-1 between the first and second build material is ≥ 5A to ≤ 55A and/or ≥ 5D to ≤ 40D. wherein the build material in each of the individual steps II) is selected from a first build material containing a thermoplastic polyurethane polymer or a second build material different therefrom that contains a thermoplastic polyurethane polymer, wherein step II) is conducted at least once with the first build material and step II) is conducted at least once with the second build material, wherein the first and second build material differ from one another by their Shore hardness to DIN ISO 7619-1 and wherein the difference in Shore hardnesses to DIN ISO 7619-1 between the first and second build material is ≥ 5A to ≤ 55A and/or ≥ 5D to ≤ 40D.